Purchase Order - Document Name

Hi All,

I have successfully managed to replace the IFS Purchase Order report with our own Crystal Report, all works fine.  When you email the purchase order the pdf is attached to an email example : Purchase_Order_18042.pdf

the number in the document name (i.e. 18042) relates to the unique RESULT_KEY field (from PURCH_INFO_SERVICES_RPV)   generated each time you request a Purchase Order print.

Is it possible to change the document name so it includes the Purchase Order number and not the Result Key.

Thanks.