Solution : https://service.sap.com/sap/support/notes/540849 (SAP Service marketplace login required)
Key words : 
output'      long              20    'result output'      heading           20     'result output'   development class, ddic changesabap workbench -> ddic objects -> development -> dictionary, short             10     'resoutp'      medium            15     'res, '/sapapo/bop_parameter' data type, data type '/sapapo/bop_display_result', 'result output' indicator, result output'    domain, 'result output', '/sapapo/bop_display_result'   save, /sapapo/atp_tool   save
Related Notes : 
       
| 513895 | Cannot create spool request | 
| 490685 | Backorder processing: performance update | 
| 486628 | Backorder processing: Displaying performance results | 
| 375193 | Backorder processing: Composite SAP note on posting |