Solution : https://service.sap.com/sap/support/notes/616635 (SAP Service marketplace login required)
Key words :
system creates blank lines, terms cancel deletion flag, relevant structure change, hierarchy change reason, project planning board, simulation planning board, attached program correction, structure planning, project hierarchy, simulation version
Related Notes :
| 611501 | CJ2B: ABAP runtime error when structure is changed |
| 609408 | CJ2B: Cancel deletion flag for an activity |