SAP Note 28436 - Save WBS elements w/o required characteristic

Symptom:

You can save WBS elements although you have not entered values for the mandatory characteristics (required entry).
The system does display an appropriate error message, however, it still saves the data when the user cancels.

Cause and prerequisites

Program error

Solution
Correction

Additional key words

Project summarization, classification, SAP_KKR_CLASS
Transactions CJ01,CJ02,CJ11,CJ12,CJ20,CJ21,CJ23,CJ27,CJ2B,CJ2D