I have the problem with de activity type and the cost element secondary, the system show the message the error in the change the activity type or display, when I check in the field Allocation cost element. "Cost element PS1001 does not exist in controlling area 1000 Message no. KS030". I made the verification in the TX KS03, but the cost element is created correctly, the valid from is 01.01.2010 to 31.12.999 and the activity type has the same date.
The activiy type has movement with the same cost element PS1001. For me it is not correct assign other cost element, because the traceability of information, I do not understand what happened, if the system was working ok.
Someone can help me with information to solved the problem.