Technical data

4
DCPS Restrictions
The following sections identify the current restrictions that exist with DCPS. See
the DCPS System Manager’s Guide and DCPS User’s Guide for printer-specific
restrictions.
4.1 Printers with Auto-Sensing Features
Many printers can sense the data type of a print job. Such printers allow you to
specify how and whether the auto-sensing feature is enabled, per interconnect
channel, through the front panel or printer management software.
For most printers that offer this feature, the DCPS software works properly when
the printer is set to ‘‘PostScript’’ mode or to ‘‘Auto-Sensing’’ mode. You must set
such printers to operate in one of these modes before starting the DCPS queues.
The DCPS software does not operate properly if the printer is set to ‘‘PCL’’ mode.
See Chapter 3 and the DCPS System Manager’s Guide for additional
information.
4.2 Job Remains in Starting State for Raw TCP/IP or LAT Queue
Most printers respond to the PostScript synchronization command at the
beginning of a DCPS job, but some do not. If all jobs to a queue remain in the
Starting state, you may need to take one of the following steps:
• Change Printer Language Setting
Often, setting the printer’s language-sensing mode to PostScript, instead of
auto-sensing between PostScript and PCL, will solve the problem. Refer to
your printer documentation for instructions on changing the language for the
appropriate port. This is the preferred method for avoiding the problem.
• Define NO_SYNC Logical Name
If the problem is not solved by changing the printer setting, you can tell
DCPS to skip the PostScript synchronization command by defining the logical
name DCPS$queuename_NO_SYNC and restarting the queue. This works
with printers that use Raw TCP/IP or LAT connections on built-in Network
Interface Cards (NICs). It has no effect when using printers connected with
other interconnects.
4.3 Job Remains in Starting State for Raw TCP/IP Queue
If you set up a DCPS queue that uses a Raw TCP/IP connection and specify an
incorrect TCP port number for the printer, any print jobs that you submit to the
queue will remain in a starting state. DCPS cannot determine that you have
provided an incorrect port number, because the network failure that it receives is
no different than if the printer had been busy or offline.
DCPS Restrictions 4–1