Microsoft office interop excel application class not registered. ApplicationClass' to 'microsoft.

Microsoft office interop excel application class not registered Application(); var process = Process. I have tried to load Microsoft. 50727), which is located at: C:\Program Files\Microsoft Visual Studio 10. Configuration of system is as below. Excel; 80040154 Class not registered ERROR in Outlook 2010 Add In. outlook. Range ' Start Excel and get Application object. Looking for object with. application C# Load 5 more related questions Show fewer related questions 0 I'm using Visual Studio 2010 and getting an Unable to cast COM object of type 'Microsoft. Excel Public Class Form1 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1. 0, runtime version v2. 6 and CPU type is set to x64 The code that's not working - line marked where it fails public bool The application pool user of my . Asking for help, clarification, or responding to other answers. You might be able to develop Web Service on another computer (that has Excel) then call that web service from the server to process the request and send back the result. It all works in my local environment. Microsoft. MBPMainMenu; using static MoodysBasketPull. I have a reference to Microsoft Excel 16. i have a powershell script which convertes csv to pdf using Microsoft. Application is not defined" Type "Microsoft. EXE" anddddd try using excel application scope again after that. Application'. Application would work just fine because Microsoft. Net in Micrsoft Office, I used Visual Studio 2022 Current and . exe) also uses the registry to locate primary interop assemblies. When I run the application, it gives the following error: Unable to cast COM object of type 'System. I just had the same problem, but none of these answers helped me. Application Computer\HKEY_CLASSES_ROOT\PackagedCom\ProgIdIndex\Outlook. Application". The key location should be something like HKEY_CLASSES_ROOT\TypeLib\{00020813-0000-0000-C000-000000000046}\1. Worksheet is not defined" What I want to do is to run the file without the errors so that I can import and export data from excel to vb. Application(); _Excel. NET-friendly layer on top of the COM APIs provided by the Office applications themselves. Application and Excel. Unable to cast COM object of type 'Microsoft. This operation failed because the QueryInterface call on the COM component for the interface with IID '{000208D5-0000-0000-C000-000000000046}' failed due to the following error: Element not found. StartTime). Threats include any threat of violence, or harm to another. oXL = Reference these 2 DLLs: C:\Program Files\Microsoft Visual Studio 10. Application() I don't think there is. Click Apps to open the Apps & features window. Application which is the line that's giving me the error! I've tried googling this error, and the only response is that I need to declare xl as Microsoft. Use "Apps and Features" and then find your Office installation and then choose Modify. In this Forum, we are Microsoft consumers just like yourself. Web. Interop on a Windows Server is not (officially) supported by Microsoft, and is also very prone to errors. I tried everything you suggested but I was only able to Boot into Safe Mode. Application xlapp = new Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Application Like Hans already said you need to create an Excel application first, then you add a Workbook to it, then you add a Worksheet (or try to access an already existing Sheets[1])Give using Microsoft. Qualify each type with the name of the application that is supplying the object. Workbook Dim oSheet As Excel. select the . Featured on Meta The December 2024 Community Asks Sprint has been moved to March Registry Editor; I read that you can add DependOnService in the service. 0 is totally a different phenomenon and public ref class ApplicationClass : Microsoft::Office::Interop::Excel::Application [System. Excel > 12. Office. excel for almost 10 years. Hi I've this C# application which opens excel file and updated another excel file. However, an OpenXML based approach does have limitations - a big one is around elements that require a knowledge of the page size to work We have created one small excel application using Microsoft. Hi, I'm trying to make a simple vb code with a button to open excel (with macro) in visual studio, as you can see below: as you can see below: Imports xls = Microsoft. When I run my application I get the above runtime exception. Excel" %> however, whe COMException error: 80040154 Class not registered in microsoft. Core without also installing Office. Application = New Microsoft. dll (version 14. NET web app. In Form_load put this code: I'm working on a Asp. If it persists after updating Office to 2102, feel free to share the relevant code here, so community members Microsoft. Excel; The only compatible library that i found is . EXE is pointing to a valid file location. _Application'. Here is the relevant code: Thanks for your prompt response yesterday. COMException: 'Retrieving the COM class When I call new Microsoft. Hi Jeff, Do you have registered the dll files ( sample: Microsoft. Something about the how the C: drive was mounted was breaking the Microsoft. However, you must compile the code with the same bitness as your Office. 6. dll leads to the following error: An unhandled exception of type COMException: Retrieving the COM class factory for component with CLSID {00020819-0000-0000-C000-000000000046} failed due to the following error: 80040154 Class This is likely because Microsoft Office is not installed on the server. 2) It has office webapp installed. Application(); } } } c. Dim appWD As Word. This can be caused by installing a newer version of Microsoft Office, and then removing it and installing an older version instead. This is a widely-spread issue with Office applications. Reinstall after trying to find out why the registry is corrupted. Open Control Panel - Programs and Features. InteropServices. excel = new Microsoft. I am trying to import it in a . Worksheet Dim raXL As Excel. xlsx&#39;. Eureka!!! Deleting those extra legacy Registry keys did the trick. Those were the steps that I took and I sure hope it (or the other links I posted) helps someone else too. Although it is not necessary to register primary interop assemblies unless you plan to use Visual Studio, registration provides two advantages: A registered primary interop assembly is clearly marked under the registry key of the Unable to cast COM object of type 'Microsoft. Overview. Excel; using System; using System. Application(); Finally I was able to resolve my issue. This happened to me today out of the blue in a system that has been using interop. Application Dim objBook As Excel. Interop' doesn't contain any public member or cannot be found. We have built DLL using 32 bit and when calling through application, we are getting error - "Retrieving the COM class factory for component with CLSID {00024500-0000 Based on experience, this is due to bad dll / com file. Excel is an Office Primary Interop Assembly that you could ship with your application no matter whether the client has Office installed or not. Excel namespace. With Excel closed, go to the Windows Menu and choose Run. Make sure the namespace or the type is defined and contains at least one public member. 0\Visual Studio Tools for Office\PIA\Office14 C:\Program Files (x86)\Microsoft Visual Studio 12. Unable to cast This problem is mostly caused by incorrect COM Interop settings in the Windows registry. 0_etc > Microsoft. What do I need to do to handle this problem. • The file is being used by another program. The project is detecting the Microsoft. ReadLine(); } Retrieving the COM class factory for component with CLSID {000209FF-0000-0000-C000-000000000046} failed due to I had developed a system that deals with excel sheets in 2006 using MS VS 2005. ' using the fully-qualified class name as an example. Problem is now it get the hated "REGDB_E_CLASSNOTREG" exception as soon as I try to instantiate a "new Word. Excel and Microsoft. OpenXML does allow creation of documents, and libraries like ClosedXML can help to make OpenXML easier to work with if you have previously used VBA for example. to. Workbook x1Workbook = x1App. it, you could look at the following link. dll to interact with Excel on the server, you will need to install Make sure Office is installed and working properly. This response suggests moving to ADO, which I might be willing if I could find some examples of how to do so. my application was 64bit (running as Any CPU on 64bit OS). Following works: Web Application hosted in IIS, creating excel documents. If this didn't solve your problem or you need further assistance please answer in this thread and i would be happy to help. Application excel = new Microsoft. dll by using Python3. There are several possible reasons: • The file name or path does not exist. No runtime, like Access. If you want to know more about . 0_x86__8wekyb3d8bbwe Computer\HKEY_CLASSES_ROOT\PackagedCom\ProgIdIndex\Outlook. Interop is imported Dim oXL As Microsoft. Application App = new Microsoft. After performing the above in addition to an iisreset to reflect proper admin status of the app pool user, everything worked fine. exe "C:\Program Files\Microsoft Office\Root\Office16\EXCEL. 0 object library. 2 and Microsoft Access 2016 I didn't see Intellisense when writing code, and when I execute I get the error: Class not Microsoft. Application(); Sometimes it takes time to System. Excel\14. 9\0\Win64 Installed developer for powershell 2022 and ran regasm. 0 (. Visible = true; Why MSI installer works?: "Fix it" tool seems to do registry cleaning job not very well, because it doesn't even delete HKCR\WOW6432Node\TypeLib\{00020813-0000-0000-C000-000000000046}, which can lead Solution: Use one of the following steps Re-install or repair install Microsoft Office; Re-install the operating system on the affected machine By default, Office primary interop assemblies (PIAs) do not need to be installed on end user computers if the Embed Interop Types property of each Office PIA reference in the project is set to True, which is the default value. All Excel add-ins/automation applications should systematically release their references to Excel objects when they are no longer needed. Excel nuget which is giving error in Office 2021 version. Can't find Microsoft Excel Application with CLSID {00024500-0000-0000-C000-000000000046} - Microsoft Q&A. The 'Quick Repair' worked for my situation. net framework 4. Outlook or Interop. I recently upgraded to a Windows 10 machine running Office 2016. but when we moved the code to staging server. Excel; Application excelApp = new Application(); excelApp. Workbook objects - is not recommended and not supported by Microsoft. When I call the Excel API from within my C# application, I get the following error: System. jet. Private Sub ButtonCreateExcelFile_Click( sender As Object, e As EventArgs) Handles ButtonCreateExcelFile. Core (Microsoft Office 16. Application= new Microsoft. In the GAC there is microsoft. Excel) cuz it only support excel 2013, but the first one 'Syncfusion. The reference to Interop. 2 project which is using that uses Microsoft. Excel QueryInterface call on the COM component for the interface with IID failed due to Library not registered. 16 Harassment is any behavior intended to disturb or upset a person or group of people. Dim ExApp AS Excel. Account profile; Download Center; Microsoft Store support Imports Excel = Microsoft. Click Dim appXL As Excel. – Open the problem database and type Ctrl-G to open the VBA editor. How to download the microsoft excel 16. Application: using Microsoft. As application is on the edge, I can not change mechanism. Excel As I mentioned, everything was going fine and it still compiles with no errors, then suddenly this morning I was getting this error: COMException: Retrieving the COM class factory for component with CLSID {00020819-0000-0000-C000-000000000046} failed due to the following error: 80040154 Class not I have already installed Primary Interop Assemblies. Skip to main Microsoft. I got it from here. Brief details: Running Office 360 with Excel 64bit installed. Microsoft. 1, Office 2003 Warning: Excel Viewer is retired. application C#. Hi Wilbert, Sorry for the inconvenience it may have caused. Application() to initialize, an Library not registered. dll and C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel The imports statement is there: imports Microsoft. Customer is not able to install office 2010 on top of 'office webapp'. ApplicationClass' to 'microsoft. _Application. dll in my powershell script. NET 4) you can go with much easier syntax. Could not load type Microsoft. Application(); excel. __ComObject' to interface type 'Microsoft. Outlook_16051. InteropServices Imports Excel = Microsoft. Application'" How to solve “Unable to cast Then add reference to Microsoft. CLSID:{C62A69F0-16DC-11CE-9E98-00AA00574A4F}" But It is not working for other computer having Ms office 2007. On the menu select Tools References. dll and C:\Program Files\Microsoft Visual Studio 10. var app = new Application( ); var workbook = app. InvalidCastException: Unable to cast COM If you're using C# 4. Learn how to determine the version or culture of Excel using Microsoft. the code works fine on my loca. dll version 12. Word. This operation failed because the QueryInterface call on the COM component for the interface with IID '{000208D5-0000-0000-C000-000000000046}' failed due to the If you have installed latest Visual studio and want to To locate library of Microsoft. 2. If list doesn't shows the desire version then you may have another vision of Office with Excel installed. Otherwise, use I have generated excel file dynamically using c# code where i refer Microsoft. Make sure that the registry key value ending with EXCEL. I need to use excel automation in my ASP. 12325. Excel on local {00024500-0000-0000-C000-000000000046} failed due to the following error: 80040154 Class not registered (Exception from HRESULT Maybe use openXML next time you want to make excel files from a server application. System. Workbook and I found that the fix to not use the C:\ drive on my AWS windows system but the D:\ drive. ). var app = new Microsoft. Net Framework 4. This classID on the MSDN site brings me to the Office 2010 Outlook. Excel on nuget package. Application in the Microsoft. NET, DCOM, and NT Services), because Office may exhibit unstable behavior and/or deadlock when Office is run in this environment. NET tab and look for the object library called Microsoft. Error Office automation - the usage of these Excel. (Inherited from AppEvents_Event) : ProtectedViewWindowActivate: Occurs when a using Excel = Microsoft. GetProcessesByName("EXCEL"). 8 project, while trying to use Office interop. I have tried both with and without the . Excel; xl. For your filter, I suggest adding an option for . Workbook is not defined" Type "Microsoft. dll), but this is not the one that was referenced in the project I was trying to get building. using excel = Microsoft. Excel. But it doesn't help. a. exe successfully for following two items: C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft. For Office 2007 no clSID is listed. In Hi Wilbert, Sorry for the inconvenience it may have caused. xls"); In regards to var: it makes you job easier cuz C# decides which type to chose and go for. This occurs when trying to instantiate a COM interop object. I was following Add reference > Browse > C: > Windows > assembly > GAC > Microsoft. NET Framework 4. Dim ExApp AS Microsoft. Class not registered" Solution 1-I can't find iCloud. This operation failed because the QueryInterface Microsoft does not currently recommend, and does not support, Automation of Microsoft Office applications from any unattended, non-interactive client application or component (including ASP, ASP. Office Development - Microsoft Q&A @nam Rt-click the project name, select Add, then References. Application\Microsoft. Excel; using static MoodysBasketPull. I have gone to hell and back with Microsoft. Workbooks in the Microsoft. Application: Windows form Application, Server: 2016 windows server Plateform: server 64 bit. You can also copy data from Excel Viewer to another program. Interop Public Class Form1 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1. Imports Microsoft. XlsIO) instead of (Microsoft. You should look into OpenXML (or libraries based on that) for generating excel files in an ASP. You can do Office repair in this case. Here is the brief explanation of the interop assemblies: Microsoft. My work-around has been to delete the explicit Microsoft. dll in my script by coping it to the server. 20298. In order to use the Microsoft. Word ? In short, what are the dependencies of Microsoft. 4. XlsIO' does support Excel 2016; The loader class below will Retrieving the COM class factory for component with CLSID {ID} failed - Microsoft Community. However, you cannot edit data, save a workbook, or create a new workbook. The application developed in Visual studio 2005 and Office 2016. After some hair pulling - the answer turned out to be that lowercase "interop unable to cast COM object of type 'microsoft. By The Way, you can use any. COMException: Retrieving the COM class factory for component with CLSID {3C250CBD-6CC9-11D2-9457-00004B48467E} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)). ApplicationClass. In main part of application I call this line: Excel. If I use Interop. Some help was obtained after searching in MSDN. dll – Using Microsoft. NET 4. I am trying to use Microsoft. What am I doing wrong? Here some screens of the setups: I have the references to assemblies, I have Microsoft Office installed, and my Word is active I would think that it should be. I could not open Settings either to Additional information: Unable to cast COM object of type 'Microsoft. However, when I get to the bit that uses my colleague's DLL to access Excel, an exception is thrown, with the message above. There is a viewer, if that's any help. COMException: Microsoft Office Excel cannot access the file &#39;C:\inetpub\wwwroot\MyFirstWebService\App_Data\Results. InvalidCastException: 'Unable to cast COM object of type 'Microsoft. Excel The imports statement is there: imports Microsoft. e. The following code works for me. But when I checked HKEY_CLASSES_ROOT\Wow6432Node\Interface{00020970-0000-0000-C000 Import statement: Imports Microsoft. NET, DCOM, using Microsoft. Select Microsoft Office in the This operation failed because the QueryInterface call on the COM component for the interface with IID ‘{000208D5-0000-0000-C000-000000000046}’ failed due to the following Unable to cast COM object of type 'System. Click Dim xlApp As New Excel. Application= new Excel. 0. . All the errors mention 'Library not registered TYPE_E_LIBNOTREGISTERED' See separate IBM Technote #532153 for more information on symptoms. Application Dim xlWorkBook As Excel. net app that was using interop was added to Admin but did not take effect due to iis caching environment. We should have identical setups: Windows XP Pro SP3, VS2003, . Private Right after the Excel Application class is instantiated I get a hold of the Excel process that was just created. 0 Object Library, and I ended up having to modify statements like. Excel . I did see that post, now I see several of the answers BELOW the ones I was attempting were correct. InteropServices; namespace ExcelToPdf { public class ExcelApplicationWrapper : IDisposable { public Application ExcelApplication { get; } public ExcelApplicationWrapper() { ExcelApplication = new Application(); // start excel application } public void Dispose() { // Each Open Microsoft Windows Settings. Let me know if this works. Provide details and share your research! But avoid . Runtime. Excel of the version you need. Then, you can find the library in the following picture. Open(@"C:/Users Type "Microsoft. Workbook Dim xlWorkSheet As Excel. Excel) that you use in Workflow Administration Console? regards, The dependency 'Microsoft. Application xlapp = new using Excel = Microsoft. Now, I can not use the same reference with MS VS 2012. 4. Excel As I mentioned, everything was going fine and it still compiles with no errors, then suddenly this morning I was getting this error: COMException: Retrieving the COM class factory for component with CLSID {00020819-0000-0000-C000-000000000046} failed due to the following error: 80040154 Class not In my case the class was registered properly and built in ANY CPU / 64 bit mode. I have set up SSIS package with C# code getting excel file data with this line : using Excel = Microsoft. Excel in a formatted manner. Public Class FormExcelTest_VB . 0 Object Library from the Add References dialog, COM tab. I fixed the references in the project to point to the correct objects now. dll, office. But the Enable 32-bit Applications property of the IIS Application pool of the application which uses the class was set to True. dll to interact with Excel on the server, you will need to install Microsoft Office on the server. It won't do any harm until you start using it. dll,add a reference and make the solution work on every machine? I checked and saw the 2013 one was not activated so I just uninstalled it. Every job is executed inside separate threads. Excel. Look: Microsoft does not currently recommend, and does not support, Automation of Microsoft Office applications from any unattended, non-interactive client application or component (including ASP, ASP. I'm trying to create an Excel document via C#. oledb. Click Dim objApp As Excel. Worksheet Dim Microsoft Visual Basic for Applications, Class not registered. Dim appExcel As Microsoft. 0) and the Specific Version property to False for the Office Interop assembly reference, then your code should work with any version of Excel. Application is built on . (Inherited from AppEvents_Event) : NewWorkbook: Occurs when a new workbook is created. APICalls; namespace MoodysBasketPull { class EssbaseLoadPrep { //Create variables used throughout the script and set those that need to be glaobally set private static readonly Excel. This operation failed because the QueryInterface call on the COM component for the interface with IID '{000208D5-0000-0000-C000 'Microsoft. When I try to manually add the reference, I As it happens, you cannot even BUILD a project which contains references to Microsoft. dll, Microsoft. this works. ApplicationClass' to interface type 'Microsoft. Class was not found because of the architecture mismatch between the application pool configuration and the actual registered class. 0 is registered. COMException: 'Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the If you set the Embed Interop Types property to True (since . Of I'm trying to write a wrapper library for Microsoft. Open(result[0]); Other notes: You should call dlg. Outlook or any other Microsoft. Office 365 Excel class not registered Hello, The latest Office 365 update (2205) has been applied to our PCs. This operation failed because the QueryInterface call on the COM component for the interface with IID '{000208D5-0000-0000-C000 Office: A suite of Microsoft productivity software that supports common business tasks, including word processing, email, presentations, and data management and analysis. dll and C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel However, some of machines are throwing following error: Microsoft. There, enter the following, including the quotes: "C:\Program Files (x86)\Microsoft Office\Office14\Excel. I must find solution for this. I did find the dll on my pc in the location Mostey noted: (C:\Windows\assembly\GAC_MSIL\Microsoft. Excel in C#. 0\Visual Studio Tools for To fix this, use Microsoft. Application excel = new xl. NET 1. Based on Release notes for Current Channel, the latest version of Microsoft 365 is 2102 (Build 13801. Warning 306 Namespace or type specified in the Imports 'Microsoft. Interop Skip to main content. Unable to cast COM object of type 'microsoft. 80040154 Class not registered in microsoft. Workbook Dim shXL As Excel. we always forget to close interfaces which we have used form Microsoft. X Class not registered. Application Dim wbXl As Excel. Page { protected void Page_Load(object sender, EventArgs e) { excel excelObj=new Microsoft. If interested you can read about dynamic and var styles. 20266), I would like to recommend you update Office to this version and check if it get resolved. Are any of them marked MISSING? If so uncheck the checkbox by that reference, exit Access and try again. Here is my code : using xl = Microsoft. its. My project has a reference to Microsoft. Development: The process of researching, productizing, and refining new or existing technologies. If you don't find Learn more about the Microsoft. exe doesn't close even if when I realease instances. Application ExcelApp = new Excel. exe is kind of like the engine. Add the Microsoft Excel 16. With Excel Viewer, you can open, view, and print Excel workbooks, even if you don't have Excel installed. I try to create a new Outlook AppointmentItem to work with thinking that I can add it to the calendar eventually. Application") I have searched online about this extensively, and found Here is the code: Microsoft. Namespace Class. excel. In this scenario, the type information for the PIA types that are used by your solution is embedded into the solution . E I wanted to know that is it necessary to install Microsoft Office on server in order to use Microsoft. Application; namespace TestHosting { public partial class WebForm1 : System. b. Desktop. The only way to get any informations from the COM object is to use some methods. 5. Word, I can not access any properties. I've corrected the application's project references to point to the Office 2016 references (Access, Excel, etc. Interop. {"Unable to cast COM object of type 'Microsoft. Workbook SaveAs2 function call. 0__71e9bce111e9429c\Microsoft. public partial class Service1 { //Declare logger //Open the excel file Microsoft. (i am working using VS2008) Why is Word Interop complaining of a "class not registered" error, when Excel interop doesn't? 0. 0\Visual Studio Tools for Office\PIA\Office14\Microsoft. Application'" 0. ClassInterface(0)] [System. net MVC project, which have a function that allow user to upload an excel file to server,server then process data from excel and save to database, It's working perffectly until to day,as the title, I met the follwing error: Unable to cast COM object of type 'Microsoft. AfterCalculate: The AfterCalculate event occurs when all pending refresh activity (both synchronous and asynchronous) and all of the resultant calculation activities have been completed. UI. . xlsx files, to Screen shot of Excel > VBA Editor > Tools > References (shows file path where it is expecting Microsoft Office xx. As far as i know -in order to use the Built in Excel Manipulation functionality i need to have Microsoft Office installed (i'm i right)? Or can i just download the dll Microsoft. Office: A suite of Microsoft productivity software that supports common business tasks, including word processing, email, presentations, and data management and analysis. I have tried this solution this solution , but it generates microsoft. Word to read the data in file and for page count. 1. How AI apps are like Google Search. interop. exe" /regserver . Office namespace". One kind of job is exporting an Excel file to HTML format. (Exception from HRESULT: 0x8002801D (TYPE_E_LIBNOTREGISTERED)). dll and stdole. Worksheet Dim oRng As Excel. Once the fix is applied, retry opening the excel workbook. click ok; The object library should now appear in Blog COMException "Class not registered" on 64-bit Windows. For example, the following statement declares a variable that points to a Microsoft Word document and another that refers to a Microsoft Excel workbook. Failing to systematically release reference to Excel objects can prevent Microsoft Office Excel from shutting down properly. Excel appears in the project I used this approach for getting a property that is the application in the main class. Solution 2-I press Windows Key+X and instead of Command Prompt (Admin), it shows as Windows PowerShell (Admin) Import statement: Imports Microsoft. Workbook Dim objSheet As Excel. Select Modify, then Quick Repair, and follow the onscreen instructions. It seems to work: First I use aliases to make things easier to read, so XL is set up with the using statement: using XL=Microsoft. net datagridview. If it persists after updating Office to 2102, feel free to share the relevant code here, so community members Installed developer for powershell 2022 and ran regasm. (Syncfusion. Workbook I've an application that automates some file related jobs. Application. ShowDialog() last - that way, your filters will take effect. dll extension. I have a C# winforms app and I am simply trying to open an Excel sheet. I'm encountering a problem with a C# . 7. Excel and alias. When I try to add a reference to Microsoft. So it turns out, apart from the permissions, it is also very important that the application architecture should be similar i. Excel Class not registered on server The code worked fine but after Office 2016 installation i have seen that i couldn't use using Excel = Microsoft. Therefore, they can only work if Office is present as well. Application, wbXL As Excel. I'd suggest you create a new thread in Office Development which is special channel to handle such issue. Unfortunately, when running VB macros in Excel, we get the following message: Windows 11 apps; Microsoft Store. Application(); It give me an exception: System. Word assembly reference correctly but the excel reference still cannot be found. dll We want to ship this application on client side. Since then " Unable to cast The entry for "Microsoft Excel Application" is not there in DCOM Config I suggest you to log-in to Windows with the service user and run Excel one time to have a user profile set up and Excel registered to that user. End user is experiencing errors when using Excel-related functionality with Controller. Our Window form application is throwing following exception only on one server for specific feature to access on click of button(all other features are accessible and working fine on this same server for same application). About; COM could not find the registry key either. kind I have . 1) It is a sharepoint server 2010. Whenever you run into such an issue, make sure following also (apart from The Excel. Excel' could not be found. Core references and replace them with with dynamic and var keywords which One site suggested "fixing" the Office install, which I did to no effect. Excel; Microsoft 365 and Office; Search Community member; Library Not Registered when I run the following command: Set objExcel = CreateObject("Excel. aspx file using the following code: <%@ Import Namespace="Microsoft. 0 provider is not registered on the local machine Try running Excel with the /regserver switch. The project compiles without errors. 0 Object Library) I This is a primary interface in a COM coclass that is required by managed code for interoperability with the corresponding COM object. unable to cast COM object of type 'microsoft. x Object library to be): This directory on my computer with hidden files showing, but DLL nowhere to be found: 4 dlls being copied into app folder: Microsoft. The number of libs depends on the code - what features are used (classes etc. Vbe. As per @Tom Sun's answer there is no Office interop in Azure. Application x1App = new _Excel. ' Excel. OrderByDescending(p => p. This is likely because Microsoft Office is not installed on the server. Interop, the "Office" part is red and says "Can't resolve symbol 'Office'". Use this primary interface only when the method you want to use shares the same name as an event of the COM object; in this case, cast to this interface to call the method, and cast to the latest events interface to connect to the event. Application Dim oWB As Excel. I use Microsoft. Application(); getting this error: System. This operation failed because the QueryInterface call on the COM component for the interface with IID '{000208D5-0000-0000-C000 I am using Visual Studio 2010 to create a Outlook 2010 Add In. Having finally got myself running live on Windows 7, this morning it was time to fix the one problem remaining - Visual Studio 2008 throwing the COMException "Class not registered" (REGDB_E_CLASSNOTREG) when trying to call InitializeComponent on a form which has an ActiveX control on it: Unable to cast COM object of type 'System. Computer\HKEY_CLASSES_ROOT\PackagedCom\ProgIdIndex\Outlook. First(); a number of call-back objects get registered with Excel in response to Hi @sem , I install Microsoft. NET as Microsoft. Find and click your Microsoft application in the list, such as Microsoft Office 365. regtlibv12. My app will compile. Due to security policies I'm stuck with core python libraries, which has the ctypes library for calling Any way to call Excel functions in VB. office. Excel; When I launch {"Unable to cast COM object of type 'Microsoft. Example : Excel; Microsoft 365 and Office; Created on May 30, 2022. I was getting the following: System. so, i tried using Microsoft. This operation failed because the QueryInterface call on the COM component for the interface with IID '{000208D5-0000-0000-C000 In code I'm just instantiating excel objects. Remember that interop prior to C# 4. ApplicationClass' to interface type Based on my search, you must install office application. I've recently uninstalled Office 2016 and installed Office 365. do is provide a . Stack Overflow. The object declaration is also complete: Dim xl As Microsoft. I was not able to run the Troubleshooter since the Start button is not working and I'm not able to open the Start Menu. So Likewise, the Type Library Importer (Tlbimp. NET based website. Public Class Form1. Application' I'm trying to develop a new app to process excel files. For a 32-bit version of Office, you must compile your code as x86, I have included Microsoft Office 2013 components reference in my project but still it is showing "interop does not exist in Microsoft. InvalidCastException: Unable to cast COM object of type 'Microsoft. Open("test. The other document-level Interop assembly references seem to compile but not run. Application System. During the investigation, it is clear that the cause is that the cause is that the 'bad' client device (laptop/PC where Controller Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Hi, I applied this tutorial for using . I tried to run the app with the default settings on the referenced dll: Copy Local = False Hello, I write my question here because I could not find answer after hours and hours searching on the web. Excel, Interop. dll. Workbooks. This operation failed because the QueryInterface call on the COM component for the interface with IID '{000208D5-0000-0000-C000 Application wordApp = new Microsoft. Application excelApp = new Microsoft. Looking for Object with CLSID:{C62A69F0-16DC-11CE-9E98-00AA00574A4F} When I open PowerPoint 2010, the following appears in a panel: "Micosoft Visual Basic for Applications. dll -> Microsoft Visual Basic for Applications The excel generat code is as follows. Worksheet . Excel class so here is the code snippet and follow the structure and way have cleared objects , also Learn more about the Microsoft. using Excel = Microsoft. using the Microsoft. Application { Visible = false }; Console. Excel throws Class not registered (REGB_E_CLASSNOTREG) in Server? Ask Question Asked 7 years, 3 months ago. Interop library then you should look into below 2 folders:. C:\Program Files (x86)\Microsoft Visual Studio 12. xcqs ajy mkyh ntwci cgaeigl kgxd zgss pcao wsele yqfz