Solution : https://service.sap.com/sap/support/notes/172690 (SAP Service marketplace login required)
Key words :
change wbs elements marked, additional key words eps, eps interface, program error, advance correction, workbreakdownstruc, bapi_project_maintain, openps4msp, prerequisites
Related Notes :
| 311763 | EPS: When deleting WBS, WBS dates are deleted |
| 308188 | EPS: WBS.Maintain deletion of WBS elements II |
| 180417 | Open PS for Microsoft Project |