SAP Message 0M018 - Group display by objects

Diagnosis
You have selected an invalid option for grouping the tree display inthe selection screen of the Modification Browser (SE95) or ModificationAdjustment (SPAU).
If you want to display objects from one or several object lists, thegroups cannot be displayed according to last changed by, last transportrequest, or development class.

System Response
Error message

Procedure
Choose to display the grouping according to object.