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>In adition to the causes posed by others who replied, I've found that Windows NT caching can be a problem.

fortunately not for me - I'm on Win 98 ,

The scenario is usually: create a file, then try to open it immediately after. It can be a table, a DBC, a report, etc. On som systems, a "file does not exist" error occurs, on others, it's "file access denied". Stepping through the code works because of the time delay, while running it causes the error. The solution to these types of problems is a kludge: put in INKEY() to insert a pause into the code. Who'd a thunk it: the code runs *too* fast ;).
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had a similar problem years ago with a Windows network refusing to update for several minutes on anything but the workstation that created the change. Problem only finally went away when we switched to Novell.

Harry