Solution : https://service.sap.com/sap/support/notes/651136 (SAP Service marketplace login required)
Key words : 
publish purchase requisitions, block size greater, attached correction instructions, /sapapo/c5 reason, external procurement documents, external procurement, /sapapo/rrp3, problem occurs, terms cfep, program error
Related Notes : 
       
| 444569 | Release restrictions for APO 3.10 Support Release 1 |