[newbie] printing problem

[owenb]

This is a recent development.
When I try to print I get the following message.
Catastrophe! - KNotify
A print error occurred.
Error message received from system.
Error while reading filter description for true.
Empty command line received.

Print KGhost View gives the following:
Printer HPDeskjet 855c.
Comment: HP Deskjet 855C, Foomatic + hpijs (recommended)
Print system currently used  CUPS (common UNIX Print System) connected to local host 631

No matter what printer I designate or what print system is designated I get the same error message.
Until a few days ago the designated printer would print.  I must of done something, 
The question is now how to undo it.
Owen