windows error 0x06ef

Sorry, if this is not the right forum to ask this kind of question.

Does anybody know the meaning of this error? dec: 1775 hex: 0x06EF

German message text: "Ein NULL-Kontexthandle wurde während eines
Remoteprozeduraufrufs vom Client an den Host übergeben."
In english maybe something like: "A NULL context handle was sent from a
client to the host during a remote procedure call"

It might have occured while trying to print something. But I am not sure
about that yet.

--Heiko