Solution : https://service.sap.com/sap/support/notes/530627 (SAP Service marketplace login required)
Key words : 
correct syntax errors apo corrections, interface mm-pur <-> apo, excess dependent requirements, required notes contained, support package solution, syntax errors, apo reason, apo system, apo integration, /3 core corrections
Related Notes : 
       
| 573227 | APO integration: Dependencies between plug-in and APO SPs | 
| 543403 | APO integration postprocessing during plug-in installation | 
| 515499 | Release restrictions for R/3 Plug-In 2002.1 | 
| 453995 | Incorrect remaining duration after confirmation w. overdel. | 
| 449677 | Release restrictions R/3 plug-in 2001.2 | 
| 444569 | Release restrictions for APO 3.10 Support Release 1 | 
| 436242 | Add-On Support Packages and CRTs for PI/PI-A 2001.2 | 
| 427957 | Release restrictions for APO 3.0A Support Release 3 | 
| 385910 | APO: Take expected yield variance into account from R/3 |