Draft Document Goods Issue/Receipt cannot export to PDF file

Hi SAP Experts,

I am wondering why when we are about to export draft goods issue and goods receipt the PLD print out (Just like when we do the print preview) always open and no PDF file will saved. We are sucssesfully exported other draft marketing document (SO, ITR,Invty transfer, DR, PO) except the two (GI/GR).

Note: Added Goods Issue/Receipt can export to PDF successfully.

Please enlighten us why the SAP behaves as that.

Thanks and Regards!

Ken