Hi Denis,

check out Thread# 1257796, Message# 1260679

>If the destination zip file and the files to zip are in the same folder, it sometimes works - but sometimes get the error 'Data type mismatch'. Very puzzling. If the destination file and the files to zip are in different folders, it never works!
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>>Using vfpcompression.fll, it works hitchlessly using:
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>>SET LIBRARY TO "vfpcompression.fll"
>>resultx = ZipOpen('c:\zfolder\myzipfile.zip')
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>>but not when using a variable as in:
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>>SET LIBRARY TO 'vfpcompression.fll'
>>myzipfilex = 'c:\zfolder\myzipfile.zip"
>>resultx = ZipOpen(myzipfilex)
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>>I must be doing something wrong .. any clues, Denis
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>Works for me, but you have a typo, an ending " instead of '.