Hi Michal,
I thought it would be a good thing for me to understand a little bit about the  
file structure of PDFs.  So I started by writing a simple program to display 
the file structure of a PDF, based on section 7.5 of the PDF 1.7 manual.  I 
looked at a lot of PDFs, as well as the one delinearized by PDFEDIT, and I see 
one thing that is definitely different: the cross-reference table of the 
delinearized PDF has no object zero.

In section 7.5.4 of the PDF 1.7 reference manual on page 41, it says:
The cross-reference table (comprising the original cross-reference section and 
all update sections) shall contain one entry for each object number from 0 to 
the maximum object number defined in the file, even if one or more of the 
object numbers in this range do not actually occur in the file.

So (with great hesitation because I am ignorant of the remaining 700+ pages of 
the manual), it seems to me that the problem with reading the delinearized 
output may be because there is no entry for object zero.

Hope this helps,
Roger Burrows


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