Technical data

4.14 LIST Translator Ignores PAGE_SIZE Parameter
The LIST translator ignores the PAGE_SIZE parameter when formatting pages.
It creates pages with maximum content at a size adequate for both A (Letter) and
A4 paper:
PORTRAIT ORIENTATION: 80 columns, 70 lines
LANDSCAPE ORIENTATION: 150 columns, 66 lines
It is still possible to use PAGE_SIZE and SHEET_SIZE parameters together to
scale the logical page onto a different size sheet.
4.15 Embedded PJL Commands Discarded; Avoid Binary Mode
Drivers that create files for PJL printers, such as those for the DEClaser 5100
and the HP LaserJet IV family, include printer control commands in HP Printer
Job Language (PJL). DCPS filters out and discards that data. Therefore, printer
options selected by such drivers do not affect the print job.
When using these drivers, do NOT select binary mode. It will insert additional
commands into the file that can cause incorrect behavior when printing via
DCPS. The exact form of behavior depends on which printer is actually connected
to the queue and whether or not the job passes through a DCPS translator.
4.16 Unreliable Communication After Errors on Some Printers
Unexpected errors can occur at the end of a print job when printing to some
printers using the AppleTalk interconnect. The printers which can exhibit
problems include the LaserWriter Pro 600, LaserWriter Pro 630, the LaserWriter
IIg, and the LaserWriter IIf. Generally, the unexpected error occurs when an
explainable error occurred during the print job; for example, a PostScript error
which causes the PostScript interpreter to ‘‘Flush to the EOJ’’, or a timeout error
while waiting for manual feed. The behavior a user may see includes one of more
of the following:
• A second PostScript error or timeout error occurs
• DCPS unexpectedly loses communication with the printer
• The job trailer page (if specified) may not print
• The page count in the accounting file is not correct
• A delay of up to one minute before the job completes
The user’s part of the print job prints as expected. The unexpected error occurs
during the end of job processing (for example, getting the page count or the job
trailer page printed) done by the DECprint Supervisor. Once the offending job is
complete, subsequent jobs print as expected. No system operator intervention is
needed.
4.17 Deleting Job When Using AppleTalk
When printing using an AppleTalk interconnect, a request to delete a job
(DELETE /ENTRY) is accomplished by closing the connection to the printer. The
AppleTalk protocol does not provide for interrupting the PostScript interpreter;
therefore, the printer will continue to print page descriptions that are contained
in its buffer before it stops printing the job. A job trailer page will not be
printed.
DCPS Restrictions 4–5