Solution : https://service.sap.com/sap/support/notes/105215 (SAP Service marketplace login required)
Key words : 
additional key words mew0, account assignment category 'unkown', account assignment categories - gr, advance correction refer, create purchase requisitions, account assignment, purchase requisition, consumption posting, set correctly, ir indicators
Related Notes : 
       
| 409263 | Enterprise Buyer 3.0 Installation: Composite Note | 
| 360142 | Enterprise Buyer 2.0 Installation: Composite Note | 
| 303515 | SAP Bus.-to-Bus. 2.0B Installation: Composite Note | 
| 185164 | SAP Bus.-to-Bus. 2.0A Installation: Composite Note | 
| 180921 | BAPI_REQUISITION_CREATE copies cost center from PID | 
| 134329 | |
| 123336 | |
| 82119 | BAPI_REQUIREMENT_CREATE brings dialog screen |