Solution : https://service.sap.com/sap/support/notes/846728 (SAP Service marketplace login required)
Key words : 
purchase info record, fucntion module me_get_chargeable_price, transaction /sapnea/jscr11, /sapnea/jscr11, me_get_chargeable_price reason, /sapnea/j_sc_11, price calculated, chargeable components, chargeable invoice, program error
Related Notes : 
       
| 909979 | /SAPNEA/JSCR11 - Net value is taken from current date | 
| 864662 | /SAPNEA/J_SC_11 - Purchase Info Record price not copied | 
| 855124 | |
| 849679 | /SAPNEA/JSCR11 - Error in Calculation of Price | 
| 844295 |