Sales Order from PO Idoc: ERR related to DFUE

When creating Sales Order from a Purchase Order Idoc. At the seller side the IDoc goes into status 51 with following error:

Purchase order type 'DFUE ' is not defined

Message no. V1458

Diagnosis

Purchase order type DFUE is not allowed.

System response

The system does not allow further processing of the document.

&WHAT_TO_DO

Check in table T176T whether an entry for purchase order type DFUE exists in the language in which you have logged on. If the entry is missing, enter it in the logon language.

Please help me.

Thanks

Shweta

PS: Any help will be greatly appreciated. And also rewarded.