Technical data

D.13 Stall Timeouts
The CPS V4.1 software did not start the stall timer for directly-connected
serial printers. The DCPS software starts the timer.
In the CPS V4.1 product, the default timeout for a stall message was one
minute. This frequently resulted in ‘‘queue stalled’’ messages when the printer
was processing a compute-intensive page (and was not really stalled at all). In
the DCPS product, the stall timeout is four minutes.
D.14 Requeuing a Job
When a network error occurred while connecting to a printer, the CPS V4.1
software would requeue the job with the /HOLD attribute. The DCPS software
requeues it without the /HOLD attribute.
D.15 Reading Stream Files
If a PostScript file has a record attribute of STREAM, STREAM_LF, or
STREAM_CR, it is read in head1 mode. This allows the DCPS software to
print very long stream records that the CPS software cannot print. Files of
this type are sometimes written by PC communications programs.
D.16 Copies Start on New Sheets
When /COPIES=n is requested, and n is more than one, each copy starts on a
new sheet, even when printing with NUMBER_UP or SIDES=2. This was not
the case with PostScript jobs in the CPS V4.1 product.
D.17 Generic Queues Restarted
On shutdown, OpenVMS stops execution queues but not generic queues. As
a result, when the system starts up again, the generic queues begin running
even though they may have the wrong characteristics. When you start up
generic queues in the CPS V4.1 product, you get warning messages saying
that the queues are already running (as of OpenVMS V5.5). When the DCPS
software starts up generic queues, it stops and then restarts those that are
already running.
D.18 Proprinter Translator
The DCPS software contains a new Proprinter-to-PostScript translator
not available in the CPS product. For general information on using the
PROPRINTER data type, see the DECprint Supervisor for OpenVMS User’s
Guide.
DECprint Supervisor (DCPS) and DECprint Printing Services Software (CPS) D–9