Solution : https://service.sap.com/sap/support/notes/617349 (SAP Service marketplace login required)
Key words : 
inactive flag 'x', ipc support package 16, missing mandatory conditions, mandatory condition xyz, pricing condition reason, pricing conditions, pricing log, condition manually, condition screen, relevant condition
Related Notes : 
       
| 530835 | IPC Support Packages for CRM 3.0, CRM 3.1 and CRM 4.0 |