Class not Registered ?

app has been running for months suddenly app crashes with error message 'CLASS NOT REGISTERED' this when printing a report.

I cannot reproduce the error from raw source, anybody had experience this?
i suspect that it is not app related probs. perhaps something with the work station as in other workstation no probs.

the common problem is "END USER WONT TELL ANYTHING IT DID BEFORE THE PROBS "

rgds
cyrus

I would first look at what component is used for printing a report. Once that is done, then go and see if that component is properly installed on the client system.