Solution : https://service.sap.com/sap/support/notes/500770 (SAP Service marketplace login required)
Key words : 
pbudr/3 standard access sequences, /3 standard condition types, hierarchical condition access, prhimessage prc_messages_ext099 reason, sap software center, hierarchical condition accesses, condition records, method determineconditionrecordsforhierarchyaccess, 'empty' fields, nullpointerexception
Related Notes : 
       
| 517783 | Hierarchy access: Incorrect condition record is determined | 
| 492015 | IPC: Internal error during hierarchy access | 
| 486061 | How to get patches for CRM Internet Pricing Configurator |