Solution : https://service.sap.com/sap/support/notes/705988 (SAP Service marketplace login required)
Key words : 
purchase requisition appears, attached advance corrections, planning file entry, terms materials planning, system automatically generates, stock transport requirement, preq release order, release order, planning run, system writes
Related Notes : 
       
| 754129 | FAQ: Purchasing and materials planning | 
| 566814 | Planning file entry for MRP is not set | 
| 566481 | Planning file entry for SD or third-party requisition | 
| 325382 | BAPI_REQUISITION_CREATE: no planning file entry | 
| 182787 | No planning file entry with PReqs from SD/PP/PS |