Coming to this late, but if the zip file can be read by IO::Uncompress::Unzip but not by Archive::Zip, then it is likely to be one of the following things

1 - The archive uses Zip64

Usually used when the archive is >4Gig, but can sometimes be always set by some programs that write zip files. Archive::Zip doesn't support Zip64 yet, but IO::Uncompress::Unzip does.

2 - The central directory of the zip file is corrupt.

Archive::Zip needs the central directory in the zip file to be present and valid. The approach I take with IO::Uncompress::Unzip doesn't actually use the central directory at all. This one is unlikely.

Without seeing the file I suspect it is Zip64.

Paul