I have to check if the customer has enough money in its account before
starting the print job.
I had tested if the IPP_RESUME_JOB command works, but CUPS tells me it
is not supported.
It *is* supported for held jobs.
What do you suggest to pause printing on page boundaries and resume
printing without pages being printed twice or lost?
The most common approach is to write your own backend which manages
things separately from the printing system. The Pykota software
(available via the cups.org links pages) does this, and I've heard
that it works fairly well on Mac OS X.
Keep in mind that it is very difficult to pause and resume jobs on
specific page boundaries since you don't have a direct interface with
the print engine and very often don't have a reliable means of
detecting how many pages have actually been printed by a device.
--
______________________________________________________________________
Michael R Sweet Senior Printing System Engineer
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