Solution : https://service.sap.com/sap/support/notes/425906 (SAP Service marketplace login required)
Key words :
additional key words cj91, required entry field check, required entry field, standard wbs element, user-defined fields, attached program correction, standard project, fields exist, program error, structure ci_prpss
Related Notes :
552629 | |
415585 | Standard WBS element: User-defined fields II |
411614 | Standard WBS element: User-defined fields |