Probelm with PO output

Hi Friends ,

I am geting following error when run the ME9F and purchase order are not displaying .

"No suitable purchasing documents found

Message no. ME260

Diagnosis

The system was not able to find any purchasing documents with the selection criteria you entered.

Procedure

Please check the selection criteria you entered on the initial screen "

If any link releted to output control for purchaseing document please send .

Regards

Raghu