End Google Ads 201810 - BS.net 01 --> Hi,

I've suddenly started getting an incomprehensible threading error message when I try to use the standard open-file dialog:

"Current thread must be set to single thread apartment (STA) mode before OLE calls can be made. Ensure that your Main function has STAThreadAttribute marked on it. This exception is only raised if a debugger is attached to the process."

But my Main method DOES have "[STAThread]" preceding it. The online help goes into extensive detail on the complexities of apartment models, but doesn't give me a clue what could be causing this exception. Any ideas? Thanks!