in reply to any working PDF parsers ?

Are you sure that your file is a valid PDF file? Because PDF (resp. PDF/Core.pm raises that error message when the file contains an invalid object reference line.

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Re^2: any working PDF parsers ?
by opensourcer (Monk) on Sep 23, 2010 at 02:04 UTC
    I tried like 15 pdf's

      As far as I'm aware, people use PDF::API2 successfully. I don't know about the others.