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The XcdErrorZipStruct constant is a value indicating that the contents of the archive file are corrupted, and cannot be accessed. It is sometimes possible to use the Convert method to repair an archive that causes this error.
Archive files that have been transferred by modem in ASCII mode instead of binary mode will always cause this error to occur, and cannot be fixed with the Fix method.
This error also occurs if an attempt is made to open a Zip file that does not contain any files