If the files inside the ZIP archive have been encrypted with different passwords, ARCHPR might not be able to find the correct password. The workaround is to (1) make a backup copy of your archive; (2) remove all files from the archive except those which definitely have the same password (perhaps just one file); and (3) run ARCHPR on the resulting archive. When (if) ARCHPR finds the correct password, create another new archive, keeping the next portion of files which have the same password. If all the files have different passwords, you're in trouble – too much time for recovering them will be required; but that's the only thing you can do.

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