Solution : https://service.sap.com/sap/support/notes/814564 (SAP Service marketplace login required)
Key words : 
ipc log files, actual sales unit, scale condition records, newest ipc patch, newer support packages, support package levels, support package 20, support package 08, 0 support packages 12-20, 0 support packages 06-08
Related Notes : 
       
| 530835 | IPC Support Packages for CRM 3.0, CRM 3.1 and CRM 4.0 | 
| 486061 | How to get patches for CRM Internet Pricing Configurator |