Solution : https://service.sap.com/sap/support/notes/338497 (SAP Service marketplace login required)
Summary : 
      This SAP Note addresses the error encountered when confirming schedules for TD shipments in IS-OIL / IS-MINE systems using mass processing transactions O4B1 or O4B2. The issue is attributed to the erroneous setting of a returncode variable in the 'ROIGMASS' include of the 'ROIGTRSL' report, causing a general user exit error. The resolution involves implementing Service Pack SVP 1 for IS-Oil 4.6B when available, or an interim fix involving downloading and importing Transport SOFK001726 specifically for affected systems, as per the guidelines in SAP Note 13719, ensuring correct sequencing as detailed in SAP Notes 312430, 312435, and 312371.
Key words : 
~ftp/specific/isoil/46b/notes/note, o9 112additional key words o4b1, apply service pack svp 1, error message general error, -mine-specific note, mass processing o4b1, important supplementary information, td mass processing, shipment mass processing, import transport sofk001726
Related Notes : 
       
| 350737 | IS-OIL Service Pack 1, release 46B , CRTs 14-17 for SAP_APPL | 
| 312435 | Order of IS-OIL / IS-MINE 4.6B Notes (SAP_ABA) | 
| 312430 | |
| 312371 | Order of IS-OIL / IS-MINE 4.6B Notes (SAP_BASIS) | 
| 47531 | IS-OIL / IS-MINE / IS-CWM correction guideline | 
| 13719 | Preliminary transports to customers (note for customers) |