Solution : https://service.sap.com/sap/support/notes/548218 (SAP Service marketplace login required)
Key words :
substitution validation mass change bapi batch input, terms validation, project system, wbs elements, network activities, implemented note 495269, substitution, long runtime, dd08l reason, prerequisites note 495269
Related Notes :
536461 | Composite SAP Note on validation / substitution in PS |
495269 | Poor performance for substitution /mass change/ ... |