>>I developing VFP application in Windows NT network environment.When I rebuild app,"File access denied" error occured,I ensure that nobody running the application taht I want to rebuilded.
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>>Has this happened to anyone else?
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>>Thanks for any comment in advance
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>Do you have write access to that drive/directory/file?

Yes.I have full access in the directory that the app builded for.
To be more precise,the master program that calling the app running was all the time.Is that the problem ?