We have an HP 5550 that is showing the following error:

LPR Communication Failed: Initial connection test at bind time failed,
error: 36
Can Not Ping Printer: Last good ping: never
SNMP Communication Failed:

The printer seems to work fine. Nonetheless, I would like to try resolving
this issue in case it is a symptom of an as yet undiscovered problem.
Unfortunately, I have not been able to find anything on this error. I've
solved other "LPR Communication Failed" errors in the past, but I've never
seen this particular error.

Any help that you can offer will be greatly appreciated.