long standing customer on MSSQL 2012, this morning "a bunch of windows opened up" and now we cant find customers in the program.

Sure enough the find keys [f7] [f8] [f9] have no effect.

The f4 key brings up a populated Customer list, but selecting from that list gives a "Cannot refind record" error.

In SQL server Management Studio I rebuilt the indexes.

I deleted all the cch files.

There were no program updates.

there were no db changes made by me or my app.


What do? I've tried nothing and I'm all out of ideas.