I have a loop that open/close a temporary free table. The "use" command even have an explicit alias name. After n loops, the table will be open with an invisible (empty?) alias name. When checking with "Data Session" window, I can find an work area with empty alias but dbf() returns the underlying file name.

After simplify the loop so that it only open/close the table, I could not reproduce the problem. Now I need to introduce one line at a time to find the problem. It is taking me a long time, each test take about 2 hours before the problem occurs. I wonder if anyone have some ideas where the problem could be so that I can find the bug in a shorter time frame?

Thanks in advance.