Solution : https://service.sap.com/sap/support/notes/1178012 (SAP Service marketplace login required)
Key words : 
10      pprice15 purchase price20 purchase price10      ppricein, data type /fre/pcost_long created, initialization report /fre/initialize_pcost_in_lanes, component type /fre/pcost, data element /fre/pcost_long, enter /fre/pcost_long, table /fre/lane, structure /fre/ppc_data_sty, enter /fre/ppc_data_sty, prevent program terminations
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