PDF Export Error Messages

Why is it that in Draftsight I keep getting an Error message that reads PDF Error. Earlier today when I preformed a PDF drawing export it work just as a 11x 17 size sheet. I then tried a D size sheet (24x36), and got the follwing message: PDF Error Invalid index 2001c

Not sure why this occurring. I  did preform a error check with in the drawing and none were found.

I have been creating Adobe PDF files with DS for quite some time now with out ever having a problem. Is there a patch to fix this issue. I need to have this resolved soon as I have a client waiting on these files from me. Please help OK

 

Thanks,

David