Solution : https://service.sap.com/sap/support/notes/448847 (SAP Service marketplace login required)
Key words : 
optimizer -> supply chain planning -> supply network planning, apo implementation guide -> advanced planner, additional key words upgrade, supply network planningsection, -> maintain global settings, transaction /sapapo/cop10, snp optimizer generates, snp optimizer customizing, snp optimizer, transaction spro
Related Notes : 
       
| 436181 | Enhancements to upgrade to SAP APO 3.1 (Support Release 1) |