Xerox 6030 User Manual page 348

PLTXX can not dequeue
Status: Failed to delete a job from the logical printer PLTXX on the print service side.
Action: Check by the lpq command whether the specified job has already changed from the
wait status in the queue to the processing status.
connection busy
Status: Failed to establish connection for data transfer.
Action: No action is necessary. The print service side accepts data transfer requests for up to
10 sessions. This message is displayed if requests are received for more than 10
sessions. Usually resubmission is executed on the client side.
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Chapter 12 Ethernet Print Service (for UNIX)