GdipSaveImageToFilereturn 7

am trying to use the Twain class to scan images, but i got the result 7 in the folling statement

    st = GdipSaveImageToFile(img, sd.FileName, clsid, IntPtr.Zero)

its seems that this happen when i save on the same file for second time.

any idea to fix this ? i tried to delete  the d\file before the second scan but its lts seems locked

nasemabdullaaAsked:
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CodeCruiserConnect With a Mentor Commented:
One option is to check if the file already exists and use a different file name.
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