Solution : https://service.sap.com/sap/support/notes/426119 (SAP Service marketplace login required)
Key words : 
component type componentdoc vbeln_vaitem posnr_vamainitem posnr_vasched etenredatu edatulddat lddatlfdat lfdatmbdat mbdattddat tddat_dwadat wadatezeit ezeit_vbeplduhr lduhrlfuhr lfuhrmbuhr mbuhrtduhr tduhrwauhr wauhrlocation werks_dproduct matnrwmeng wmengplease double-click, additional key words bop, pibopxvbepdevelopment class caveshort text, prerequisites note 403602 solution create, syntax error appears, apo backorder processing, transaction se11, scheduled data, field wmeng, reference table
Related Notes : 
       
| 438111 | |
| 426120 | Backorder processing: Changing short description | 
| 403602 | Backorder processing: MBDAT is in the past | 
| 375193 | Backorder processing: Composite SAP note on posting |