Solution : https://service.sap.com/sap/support/notes/1507745 (SAP Service marketplace login required)
Key words :
customized independent formula types, program error solution, change number, editable anymore, change mode, terms cl_frml_wbo, surface_init reason, support package, correction instruction, prerequisites
Related Notes :
| 1398988 | Independent Formula with ECN number may not be changed |