Postscript with Crystal v.8 Export Using Distiller

[chrisinto]

I am using CR v.8 to print reports out to the Acrobat Distiller which puts them in PDF format. I can create tons of pages dynamically per hour without a glitch BUT every once in a while I get an error that is put into the .log file that Distiller creates at the same time it creates the PDF. This error doesn't happen consistently so it's difficult to find the underlying cause. This is the error text:

%%[ ProductName: Distiller ]%%
%%[ Error: undefined; OffendingCommand: mFSF1S43 ]%%

Stack:
[67 0 0 -67 0 0]
-dict-
/F1S43


%%[ Flushing: rest of job (to end-of-file) will be ignored ]%%
%%[ Warning: PostScript error. No PDF file produced. ] %%


Has anyone ever run into this and solved it?

Thanks in advance for any help.