I put that error into Google and it came back with hits for Excel...are you printing the Client Presentation Tax Analysis?  If so, that might explain what it was related to, the Presentation uses Excel.

Is this error just related to RightNetwork or to anything with ProSeries?  I seem to be getting this error with every return I do.  I spent a few hours with tech support trying to figure this out and the extremely slow printing.  Still happening- but now with every return I have printed this morning. 

Suggestions on how to fix this on my end if it can not be fixed by the program. 

Did you solve this.... I am having this problem now.  I have printed 8 returns today with no problems and now this. 

This year I added the microsoft to right network and I have not had that problem since.  

I updated my computer last night and all worked like a charm today.  I reprint the last 5 returns. Thank you