Error-Nr 5 (Invalid Procedure call or argument)?

I receive this error when printing batches to pdf.  I have multiple print outs queued up and each one prompts the save screen and then continues to the next.  Somewhere in the middle of the process we get this error. 

PDFCreator 1.7.3:

Error-Nr 5 (Invalid Procedure Call or Argument)
Modul: modInfoSpoolFile
Procedure: RemoveInfoSpoolFileObject
Line: 50010

Any thoughts on what is causing this?