Hi Christof,

"Christof Nordiek" wrote in message
...
I have programmend an application in C# that uses excel automation to
create an excelsheet. This worked fine, but now, on one machine, a message
pop's up saying: "The application or DLL C:\WINDOWS\system32\msi.dll is
not a valid windows image.". After that a COMException is thrown with
hresult = 800a03ec. The exception is thrown, when Workbooks.Add is called.

Did you check if msi.dll is corrupted or missing?
Use for example depends.exe to open msi.dll and see if it can be opened.

Are you using 32-bit or 64-bit windows?

--
SvenC