Solution : https://service.sap.com/sap/support/notes/836454 (SAP Service marketplace login required)
Key words : 
language-dependent special characters, master record yyy, lower case characters, problematic entries include, maintain problematic units, newest ipc patch, newer support packages, special characters, 0 support packages 04, physical units
Related Notes : 
       
| 486061 | How to get patches for CRM Internet Pricing Configurator |