Inability to load "incompatible" files following Visual Studio 19 update

[Mike_M_1]

Microsoft sent out an update to VS19 Community this am (HST).  Before that, my VS19/PSXE2020u4 system was working fine.  After updating, I attempted to restart VS and continue my work, but got message "There was a problem opening 'FSSRM.for'.  Please load the 'COGNIT (incompatible)' project and try again."  I got a variant of the same message for COGNIT.for.  Those were the only two files open in the VS19.  There was some other stuff, which I can provide if needed, including Error Code: 0x0000139F.

In addition to attempting to reload my project, I also tried all possible combinations of reinstalling PSXE2020u4; no joy.  Would appreciate having a way to avoid completely rebuilding this project (for the second time ...)

Mahalo, Mike

[Steve_Lionel · Accepted solution]

• Open a Windows Explorer (file) window to view the solution folder.
• Click View, then Options.
• Click View
• If not already selected, click "Hidden files and folders > Show hidden files, folders and drives
• Click OK
• If you now see a folder named .vs, delete it.

Now try VS again.

[Mike_M_1]

Thanks, Doc.  Your solution got me part way to where I needed to be.  However, it also revealed a shortcoming in how my project files were set up, so I ended up doing a complete rebuild anyway.  I think it's a worthwhile investment in the future.

Thanks again for your help.

Aloha, Mike