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#1299 Version 9 reports “Cannot open file as archive”

open
nobody
None
5
2012-12-07
2012-05-21
Malcolm
No

A large archive created by a parallel version of GZip is periodically supplied by an outside organisation. This archive has an GZip member at the begininning that contains only a file comment with no compressed data which is followed by a member containg the compressed data. Version 4.65 of 7-Zip and version 1.3 of GnuWin32 Gzip both successfully decompress this file but versions 9.20 and 9.25 Alpha of 7-Zip report “Cannot open file as archive”. If the initial GZip member is removed from the archive version 9.20 recognises it as a GZip archive and processes it. Ideally we would like to use the latest version of 7-Zip but at present this is not possible.

Discussion

  • Igor Pavlov
    Igor Pavlov
    2012-05-21

    Please attach small example of such gzip archive here.

     
  • Malcolm
    Malcolm
    2012-05-21

    Sample partial lisitng in lieu of actual data