PrintDocument never returns

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Hi all! 
This is my first post in this forum.

I have a .NET program running in the background which is printing PDF documents. I have a problem with the PrintDocument function: When printing some PDFs the PrintDocument function call never returns. So my program just keeps waiting for it to return indefinitely! 

Does anyone have a hint?

Using Debenu PDF Library 9.16, ActiveX version.

Best regards,
Mats

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matsj Members Profile Find Members Posts Beginner Joined: 26 Nov 14 Location: Sweden Status: Offline Points: 4	Post Options Post Reply Quote matsj Report Post Thanks(0) Quote Reply Topic: PrintDocument never returns Posted: 26 Nov 14 at 7:18AM
	Hi all! This is my first post in this forum. I have a .NET program running in the background which is printing PDF documents. I have a problem with the PrintDocument function: When printing some PDFs the PrintDocument function call never returns. So my program just keeps waiting for it to return indefinitely! Does anyone have a hint? Using Debenu PDF Library 9.16, ActiveX version. Best regards, Mats

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3530	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 26 Nov 14 at 12:10PM
	Hi Mats, if you're printing in a Loop i would wait 'till PrintDocument Returns with result 1 before sending the next printjob. Cheers and welcome here, Ingo
	Cheers, Ingo

matsj Members Profile Find Members Posts Beginner Joined: 26 Nov 14 Location: Sweden Status: Offline Points: 4	Post Options Post Reply Quote matsj Report Post Thanks(0) Quote Reply Posted: 26 Nov 14 at 12:23PM
	Hi Ingo, I'm not printing in a loop. To be on the safe side I wait until PrintDocument returns a result before issuing the next document. My problem is that PrintDocument NEVER returns. My program just "stands still" and wait for PrintDocument to return. It happens on irregulary basis and I haven't been able to see a pattern yet, except that it seems to happen more often when printing larger documents (over 200 pages). Best regards, Mats

AndrewC Members Profile Find Members Posts Moderator Group Joined: 08 Dec 10 Location: Geelong, Aust Status: Offline Points: 841	Post Options Post Reply Quote AndrewC Report Post Thanks(0) Quote Reply Posted: 29 Nov 14 at 6:35AM
	Mats, Are you freeing the documents from memory after printing ? QP.RemoveDocument(QP.SelectectDocument()); Andrew

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3530	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 29 Nov 14 at 11:11AM
	As an addition to Andrew's post: Does it happen with a very first printout, too? Cheers, Ingo
	Cheers, Ingo

matsj Members Profile Find Members Posts Beginner Joined: 26 Nov 14 Location: Sweden Status: Offline Points: 4	Post Options Post Reply Quote matsj Report Post Thanks(0) Quote Reply Posted: 02 Dec 14 at 10:30AM
	Hi, Andrew> Yes, I am freeing the document memory after printing by calling RemoveDocument. Ingo> Since I'm loading a new instance of the ActiveX for every document you could say that it is always the first printout. I do not retain anything loaded in memory inbetween printouts. Anyway I have now switched to using the dll version of QuickPDF instead of the ActiveX. Let's see if it helps. My prime suspect for the problem is a buggy printer driver. Don't know whether it is possible at all, but a useful improvement to the PrintDocument function would be to add a timeout parameter. If the printer driver has not completed its work in a certain amount of time, PrintDocument would stop and return an error. Regards, Mats