LoadFromFile failed (Delphi 2007) .. why?

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   Hi, 

I have a PDF file that refuses to be loaded using TQuickPDF0712 (Delphi 2007) LoadFromFile method.

The result of the function is "0 - The file could not be read or processed". 

The PDF is not password protected. It loads in Adobe Reader and FoxIt.

p.s.
Other documents load with no problems.

How to determine the cause of this problem? Can I upload this PDF somewhere for a test?

-zarko gajic

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ZarkoGajic Members Profile Find Members Posts Beginner Joined: 18 Mar 09 Location: Croatia Status: Offline Points: 19	Post Options Post Reply Quote ZarkoGajic Report Post Thanks(0) Quote Reply Topic: LoadFromFile failed (Delphi 2007) .. why? Posted: 18 Mar 09 at 8:56AM
	Hi, I have a PDF file that refuses to be loaded using TQuickPDF0712 (Delphi 2007) LoadFromFile method. The result of the function is "0 - The file could not be read or processed". The PDF is not password protected. It loads in Adobe Reader and FoxIt. p.s. Other documents load with no problems. How to determine the cause of this problem? Can I upload this PDF somewhere for a test? -zarko gajic

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: 18 Mar 09 at 9:30AM
	Hi Zarko! You can send it to me at ingo -dot- schmoekel -at- ewetel -dot- net BTW: Are you the Zarko from delphi.about.com? Welcome here! Cheers, Ingo

ZarkoGajic Members Profile Find Members Posts Beginner Joined: 18 Mar 09 Location: Croatia Status: Offline Points: 19	Post Options Post Reply Quote ZarkoGajic Report Post Thanks(0) Quote Reply Posted: 18 Mar 09 at 10:59AM
	Ingo, Thanks for the offer. I "know" that the file is corrupted .. I just am not sure why it loads with Acrobat Reader with no problems .. plus it would be great if when LoadFromFile fails .. a more descriptive error is provided. p.s. PDF sent to your email.. p.s. Yes, Zarko Gajic from delphi.about.com :)

DELBEKE Members Profile Find Members Posts Debenu Quick PDF Library Expert Joined: 31 Oct 05 Location: France Status: Offline Points: 151	Post Options Post Reply Quote DELBEKE Report Post Thanks(0) Quote Reply Posted: 18 Mar 09 at 11:05AM
	Hi Zarko The most frenquetly corrupted pdf are corrupted in the cross ref�rence (generaly at the end of the file). When Acrobat reader find this kind of corruption, he corrects the problem with a complete reconstruction of cross reference. I suppose QuickPdf library will do it in a near future. Cheers Edited by DELBEKE - 18 Mar 09 at 11:06AM

ZarkoGajic Members Profile Find Members Posts Beginner Joined: 18 Mar 09 Location: Croatia Status: Offline Points: 19	Post Options Post Reply Quote ZarkoGajic Report Post Thanks(0) Quote Reply Posted: 18 Mar 09 at 11:21AM
	Hi, How about some kind of descriptive (error) message to why the LoadFromFile has failed? -zarko

DELBEKE Members Profile Find Members Posts Debenu Quick PDF Library Expert Joined: 31 Oct 05 Location: France Status: Offline Points: 151	Post Options Post Reply Quote DELBEKE Report Post Thanks(0) Quote Reply Posted: 18 Mar 09 at 12:10PM
	Of course, these would be kind ;) But not easy to implement I think. A easyer way should be a return value more significant, actualy 0, all is correct and 1, load has fail. Edited by DELBEKE - 18 Mar 09 at 12:11PM

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: 18 Mar 09 at 3:03PM
	Hi Zarko! I've looked inside with PSPad (you can use any other editor as well). The first content you can see below. I've deleted the string "%%EOF", made a new save and then QuickPDF had no problem to read/load the file! It's a distiller document initially created with Word. Where this E(nd)O(f)F(ile) comes from... i don't know? A real accident ;-) A 100 mb adobe reader installation can handle this - for the 2 mb of QuickPDF it's not so easy i fear. Cheers, Ingo %PDF-1.5 %�� 10 0 obj <</Linearized 1/L 6181/O 12/E 1733/N 1/T 5934/H [ 456 163]>> endobj xref 10 8 0000000016 00000 n 0000000619 00000 n 0000000731 00000 n 0000000927 00000 n 0000001075 00000 n 0000001413 00000 n 0000001656 00000 n 0000000456 00000 n trailer <</Size 18/Prev 5923/Root 11 0 R/Info 9 0 R/ID[<CA83DDF33197EBFD70368E5A30920D4E><900CDB0B84391E449A21F582F7E253EB>]>> startxref 0 %%EOF 17 0 obj <</Length 73/Filter/FlateDecode/I 101/L 85/O 69/S 38>>stream x�b```e``�` Edited by Ingo - 18 Mar 09 at 3:05PM

ZarkoGajic Members Profile Find Members Posts Beginner Joined: 18 Mar 09 Location: Croatia Status: Offline Points: 19	Post Options Post Reply Quote ZarkoGajic Report Post Thanks(0) Quote Reply Posted: 18 Mar 09 at 3:19PM
	Ingo, Thanks for the info. I do not have any idea what this EOF is doing there :( p.s. Need to process a bunch of PDFs in my application and this file failed to load. What is important here is that this file IS corrupted - the fact that AdobeReader can read it .. who cares .. for me it would be enough to report as "cannot open file".

DELBEKE Members Profile Find Members Posts Debenu Quick PDF Library Expert Joined: 31 Oct 05 Location: France Status: Offline Points: 151	Post Options Post Reply Quote DELBEKE Report Post Thanks(0) Quote Reply Posted: 18 Mar 09 at 3:59PM
	Hi zarko In fact it does indicate you that the file can' be laoded. Here is a sample writen in vb6 On Error Resume Next lRet = m_oDoc.LoadFromFile(Value) On Error GoTo 0 If lRet = 0 Then MsgBox "File can not be opened", vbCritical Exit Sub End If

ZarkoGajic Members Profile Find Members Posts Beginner Joined: 18 Mar 09 Location: Croatia Status: Offline Points: 19	Post Options Post Reply Quote ZarkoGajic Report Post Thanks(0) Quote Reply Posted: 18 Mar 09 at 6:48PM
	Delbeke, I am aware of the function result value ... my question was initially related to "why" does it fail to load - since AReader can open it. The answer was provided by Ingo.

deabrew Members Profile Find Members Posts Newbie Joined: 19 Jan 09 Status: Offline Points: 43	Post Options Post Reply Quote deabrew Report Post Thanks(0) Quote Reply Posted: 18 Mar 09 at 7:56PM
	Zarko, Delbeke, and Ingo (plus readers), We're working on providing a solution for this problem to include in an upcoming version (7.13) of Quick PDF Library. Today, the production version of 7.12 will be released. And thanks all. Cheers, -Karl -Karl

DELBEKE Members Profile Find Members Posts Debenu Quick PDF Library Expert Joined: 31 Oct 05 Location: France Status: Offline Points: 151	Post Options Post Reply Quote DELBEKE Report Post Thanks(0) Quote Reply Posted: 19 Mar 09 at 2:35AM
	The problem don't come with this %%EOF. This is a linearized pdf. A pdf can contain more than one %%EOF in 2 cases : linearisation and incremental save. The real problem come with startxref 0. That QuickPdf can not handle at the momment.