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Conference 7.286::postscript_printing

Title:	Digital PostScript printers and their associated software

Moderator:	REGENT::LASKOHER

Created:	Wed Jan 24 1990
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	7230
Total number of notes:	31971

7215.0. "Accounting with LN17ps and DCPS V1.3" by UTRTSC::BARK () Thu May 29 1997 07:21

Hello,

Customer has problems with accounting on a LN17ps with DCPS V1.3.
He claims that DCPS is way off the real number of pages printed.
All the printing is handeled via DCPS.
In the DCPS release notes is written that the accounting info may be
serveral sheet to few due to a limitation with the LN17ps printer.
Customer claims it's much more then a few.

What is exactly the limitation wich causes this.

The printer knows the pagecount operator.

I do not have a LN17ps here so I was not able to do some tests myself.

 
Thanks,

Henk Bark
Digital Software Support Holland

T.R	Title	User	Date	Lines
7215.1	Latency factor.	HANNAH::KAMATH	`Wed Jun 04 1997 17:34`	13
	Henk, The accounting may be off a few pages PER JOB. After many jobs, the net [cumulative] effect can be significant. It is understood that due to latency in the printer the accounting information is not accurate. I also get to know that this is mostly seen in duplex printers. Currently there is known workaround to this problem. -Harish Kamath.
7215.2	What about the pagecount operator	54687::BARK	`Thu Jun 05 1997 07:14`	14
	Harish, Thanks for yoyr reply. What can you say about the pagecount operator, is the pagecount returned from the printer (also) incorrect? What exactly do you mean with the latency in the printer? Is the printer not able to count the pages correct? If yes, then I expect the pagecount also to be incorrect. Regards, Henk.
7215.3		7708::POWERS	`Thu Jun 05 1997 09:58`	19
	The 'pagecount' operator IS the method by which the number of pages printed is reported through DCPS to implement accounting. The "latency" referred to is because the PostScript interpreter maintains the page count and responds to the pagecount operator, but the interpreter depends on page printing and delivery completion by the engine, which does not take place until the pages have been released by the interpreter and passed through the engine. Harish's reference to duplex printing is due to the twice-through-the-printer paper path that duplex printing requires. As far as I know, the page count does catch up, and if a job can wait a half minute or so to inquire page counts, the actual returned count will be accurate. But DCPS can't wait a half minute, so it asks for the count right away and returns what the printer returns, which isn't quite up to date. If the customer has more clarification about what "way off" might mean, I'd like to hear it. - tom]