Solution : https://service.sap.com/sap/support/notes/453292 (SAP Service marketplace login required)
Key words : 
additional key words transaction /sapapo/snpop, program error solution implement, source code corrections, snp optimizer, background run, starting date, opening stock, location product, warehouse stock, implemented sp17
Related Notes : 
       
| 532619 | APO Support Package 21 for APO Release 3.0A | 
| 517492 | APO Support Package 20 for APO Release 3.0A | 
| 491882 | APO Support Package 19 for APO Release 3.0A | 
| 459985 | APO Support Package 18 for APO Release 3.0A | 
| 448518 | APO Support Package 17 for APO Release 3.0A | 
| 419391 | Planning start and shift in the planning book |