It seems like CommonelegateUrl property for this task was empty ? Have you an idea ? Thanks
Delegation error occurs when user already have delegated a previous task : User A delegates a control flexi task to user B. User B manages a "supplier request" task and WF continues. Next task ( "control task") is assigned to User A , who wants to delegate to User B again. That when the error occurs ! User A should be able to delegate twice, isn't he ? Or is there any constraint delegating multiple times ? Thank you for your help.