Compress::Zlib and the underlying zlib library do not read or write .Z files. These are the files from the compress program, compressed using the once-patented LZW algorithm. zlib only does deflate, the algorithm used in gzip and zip files.

AFAIK, there are no Perl modules for reading or writing .Z files. One option would be to pipe through zcat or gzip, which can read .Z files.

Why do you want to use .Z files? .gz has better compression and is probably more widely supported now.

In reply to Re^3: Compress::Zlib : what to do with the "in memory" data ? by iburrell
in thread Compress::Zlib : what to do with the "in memory" data ? by ZlR

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