[Solved] ERROR : Unable to load DLL ‘tcl84.DLL’

Question

Possible solution 1
This could be a 32/64-bit issue. If you have a 32-bit application running on a 64-bit Windows, the DLLs will be loaded from C:\Windows\SysWOW64 instead of C:\Windows\System32.

So you could try to make the application Any CPU or copy it to bin\debug instead of a system folder.

Also if your application is running in 64-bit mode (x64 or Any CPU or a 64-bit Windows), but the DLL is 32-bit only, it won’t load either, as you can not use a 32-bit DLL in a 64-bit application. You then need to compile your application as 32-bit explicitly.

Possible solution 2
The DLL itself requires other DLLs that are not available on your system. Make sure that all dependencies for the DLL are resolved.

Accepted Answer

Possible solution 1
This could be a 32/64-bit issue. If you have a 32-bit application running on a 64-bit Windows, the DLLs will be loaded from C:\Windows\SysWOW64 instead of C:\Windows\System32.

So you could try to make the application Any CPU or copy it to bin\debug instead of a system folder.

Also if your application is running in 64-bit mode (x64 or Any CPU or a 64-bit Windows), but the DLL is 32-bit only, it won’t load either, as you can not use a 32-bit DLL in a 64-bit application. You then need to compile your application as 32-bit explicitly.

Possible solution 2
The DLL itself requires other DLLs that are not available on your system. Make sure that all dependencies for the DLL are resolved.