I have an Excel file that calls a .net DLL (called “MyDLL”) in the auto_open VBA macro.
When it gets to the 2nd line below, the error below occurs:
–VBA Code–
If objSensitivity Is Nothing Then
Set objSensitivity = CreateObject("MyDLL.Calculations") '<<Crashes here
–Error–
An Error has occured: -2147024885
Automation error
An attempt was made to load a program with an incorrect format.
My system is:
- A Windows 7 64-bit PC.
- It has Excel 2003, 2007 and 2010 installed (x86)
- It has .Net Framework 1.1, 2.0, 3.0, 3.5 and 4.0 installed for both x86 and x64
- It has all the latest windows updates.
Other notes:
- I know that the DLL was created in VS2005 in VB with a Target CPU setting of ‘AnyCPU’
- It makes no difference if i change the Target CPU setting of ‘X86’ – the error still occurs.
- I recently had to rebuild my PC due to a hard drive failure, and before that it worked fine. So i dont know what has happened for it to not work now.
- The issue occurs in all versons of Excel i open the file in.
Since i know that it worked fine previous to my rebuild, and i know it works for other users running it on Windows 7 64 bit, i can only assume it is something else specific to my PC, and not the actual DLL.
Can anyone help?
I sorted this out.
I did a repair install of all my versions of Office, as i suspected it was a faulty Microsoft Interop DLL OR for some unknown reason, it was using a 64-bit version of the Interop.
Very weird, but its up an running now.