When you use an automation variable in Microsoft Dynamics NAV, you need to specify the type library of the COM object that you want to use. This allows Microsoft Dynamics NAV to access the features and functions of the COM object. You can find the type library of a COM object in the Object Designer, under Tools > Custom Controls. There, you can browse and select the type library file (.tlb or .dll) of the COM object.
What causes the error "Could not load the selected type library"?
The error "Could not load the selected type library" means that Microsoft Dynamics NAV cannot find or load the type library file of the COM object that you are using. This can happen for several reasons:
The type library file is missing or corrupted on your computer. This can happen if you uninstall or update the application that provides the COM object, or if the file is deleted or damaged by a virus or malware.
The type library file is not registered on your computer. This can happen if you install the application that provides the COM object on a different location than the default one, or if the registry entries of the file are missing or incorrect.
The type library file is incompatible with your version of Microsoft Dynamics NAV or your operating system. This can happen if you upgrade or downgrade your Microsoft Dynamics NAV or your operating system, or if you use a different language or regional setting than the one that was used when the type library file was created.
How to fix the error "Could not load the selected type library"?
To fix the error "Could not load the selected type library", you need to make sure that the type library file of the COM object that you are using is available, registered, and compatible on your computer. Here are some steps that you can try:
Reinstall or repair the application that provides the COM object. This will ensure that the type library file is installed and registered on your computer. For example, if you are using Microsoft Outlook as a COM object, you need to reinstall or repair Microsoft Office on your computer.
Register the type library file manually. This will create or update the registry entries of the file on your computer. To do this, you need to use the regsvr32 command in a command prompt or in the Run dialog box. For example, if you want to register NatHash.dll, which is a type library file for Microsoft Dynamics NAV Outlook Synchronization Common Library, you need to type regsvr32 NatHash.dll and press Enter.
Select the correct type library file in Microsoft Dynamics NAV. This will ensure that Microsoft Dynamics NAV uses the right version and language of the file on your computer. To do this, you need to go to Object Designer, under Tools > Custom Controls, and browse and select the type library file of the COM object that you want to use.
Recompile all objects in Microsoft Dynamics NAV. This will update all references and dependencies of the objects that use automation variables on your computer. To do this, you need to go to Object Designer, select all objects, and click Compile.
We hope this article has helped you resolve the error "Could not load the selected type library" in Microsoft Dynamics NAV. If you have any questions or feedback, please leave a comment below.
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