failing to create a new number range for a contruction measures
I try to create a new number range for construction measures, but I am not able to insert a new interval. The menu item "Edit --> Insert interval" is grey out.
I am using transaction code "/nsimgh" to select an IMG structure. I diplay an existing IMG structure and select the IMG activty "Define Numbers Ranges for Construction Measures" and finally I press the "Change intervals" button.
I also assume that my user has all required rights.
Many thanks for your help!