Error Missing Export Data

This error popped up when client updating a customer's country after creating sales order.

Apparently the error appears due to differences between Sales Organization Country & Ship to Party Country. This is how to fixed it. Taken from a good answer at SAP Community Network posted by Reazuddin MD http://forums.sdn.sap.com/thread.jspa?threadID=1551384.

Check- Incompletion procedure what are the fields maintained for Header / Item

IMG - SD- Foreign trade/Customs - Incompleness Schemas for Foreign trade data (VI29) & Foreign trade data in MM&SD (VI49)

if you dont want to maintain any fields in billing, Create new incompletion procedure for Header & Item, dont maintain any fields.
Assign this incompletion procedure in VI49.

Also posted by Calauz Artur :

In VF02 check the log for export data at heather level and item level, and fill those fields, the accounting document will be created.