Thanks, I think I found it (at least for now)

The debugger had a line with "messagebox('Cannot lock table(s) for MyOperation)"

I was finally able to remove it. Will test to see if that solves the problem.

Of course I have no idea how it got there.


>>I have VFP 7 only on one PC.
>>
>>The application with the problem Runs on Windows XP with all updates ( as far as I can tell).
>>
>>It is using VFP7, SDT 6.0d.
>>
>>The error message occurs when ever I try to run a form in development mode.
>>
>>The error message is "Cannot lock table(s) for MyOperation"
>>
>>Problem is I cannot find the error message in the help file.
>>
>>I can re-index all the tables and update the work files. Should I do that?
>>
>Do you have SDT events turned on? Can this problem come from SDT?
>
>I guess, it would not hurt to update and re-index the tables.