Very large PDF file cannot be loaded

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Hi!

First of all a Happy New Year to you all!

It's been a while since my last post here. But now it's time again.

I came across problems with very large PDF files. The reason seems to be somewhere in memory allocation. LoadFromFile throws an OutOfMemory exception although there's plenty of memory available. The "magical border" seems to be 512 MB.

I use the current version 6.0.4.6. 

I have created and uploaded a sample file with 40000 pages (73 MB):

http://www.upload24.de/files/40000.zip -> only 2,5 MB!

Has anyone encountered this problem before? Is the limit of 512 MB standard? Does one of the developers have an idea?

Thanks in advance.

Edited by JanN - 07 Jan 09 at 5:48AM

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JanN Members Profile Find Members Posts Senior Member Joined: 29 Oct 05 Location: Germany Status: Offline Points: 116	Post Options Post Reply Quote JanN Report Post Thanks(0) Quote Reply Topic: Very large PDF file cannot be loaded Posted: 06 Jan 09 at 8:28AM
	Hi! First of all a Happy New Year to you all! It's been a while since my last post here. But now it's time again. I came across problems with very large PDF files. The reason seems to be somewhere in memory allocation. LoadFromFile throws an OutOfMemory exception although there's plenty of memory available. The "magical border" seems to be 512 MB. I use the current version 6.0.4.6. I have created and uploaded a sample file with 40000 pages (73 MB): http://www.upload24.de/files/40000.zip -> only 2,5 MB! Has anyone encountered this problem before? Is the limit of 512 MB standard? Does one of the developers have an idea? Thanks in advance. Edited by JanN - 07 Jan 09 at 5:48AM

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 07 Jan 09 at 6:06AM
	Hi JanN! Nothing read from you for a long time... ;-) Happy New Year to you! It's the function function TPDFDocument.LoadFromFile(const FileName: QPDFString): Boolean; The file is read into a stream at FS := TQPDFFileStream.Create(FileName, fmOpenRead or fmShareDenyWrite); Perhaps it's enough to allocate memory before with "GetMem" ... Anyway there should be a smooth behavior and it should be framed with a try-except-end ;-) Oh... what's that? Writing here i've load your testfile and with our last source version it could be loaded completely (160008 embedded objects!!!). Please contact me directly at ingo [dot] schmoekel [at] gmx [dot] de Cheers, Ingo

JanN Members Profile Find Members Posts Senior Member Joined: 29 Oct 05 Location: Germany Status: Offline Points: 116	Post Options Post Reply Quote JanN Report Post Thanks(0) Quote Reply Posted: 09 Jan 09 at 5:56AM
	Hi! We have found out that loading the pdf file only seems to work. QuickPdf returns with no error. But when calling PageCount the result is 0. SaveToFile also doesn't work. I really need a solution for this. Can anyone help? I already thought of splitting the pdf file using another tool and afterwards process the parts using QuickPdf. But that's not really a solution, isn't it. Edited by JanN - 09 Jan 09 at 5:57AM

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 09 Jan 09 at 7:15AM
	You have the sources... Why not setting a breakpoint on function PageCount? I fear that the object wasn't built correct and that there are no data for pages? Is it always the same creator/producer? Cheers, Ingo Edited by Ingo - 09 Jan 09 at 7:17AM

ixm7 Members Profile Find Members Posts Senior Member Joined: 13 Jan 06 Status: Offline Points: 68	Post Options Post Reply Quote ixm7 Report Post Thanks(0) Quote Reply Posted: 05 Feb 09 at 11:33AM
	Hi JanN, I believe Marian solved that issue for me several months ago. You may want to contact him. Cheers, - Ido