Problem with Spool requests

Hello ,

Some spool requests are completed with status "Completed(Problem)". When we check the output Request Logs find below things :

Print request processing log

The host spool is reporting errors

This request may not have been printed. Status unknown

Most important attributes of spool request

Request number 43899

When we checked we are getting printouts fine but still in status we are getting completed with problem in Red mark.

Can anybody tell abt this confusing situation why we are getting status in sP01 like this.

Thanks

Anju