>>Yep, I've seen it and had it happen to me. But the reason was that the command:
>>
>>SET ORDER TO SOMETAG
>>
>>didn't generate the error it should have. The error should be "Index tag does not exist". However, you'll the "unknown variable" with compound index files if the tag doesn't exist. In each case, I forgot to create it. It was me, not FoxPro. :-)
>
>But I _didn't_ forget to create it. The index is there, part of the table. Using that _same_ table on two different computers, running the _same_ code, on one computer it can't find the index.
>
>In another case, running the same code on the _same_ computer, one time it would find it, another time it wouldn't. Same everything, different run.

Are you sure that both computers use the same data? Sometimes, program can still look at developer folder.