SAP Message RH121 - The hierarchy cannot be displayed because it does not exist

Diagnosis
You wanted to switch to the display mode but have not saved the newlycreated hierarchy yet.

System Response
The unsaved hierarchy cannot be displayed. As a result, the systemswitches back to the Administrator Workbench.

Procedure
If you create a hierarchy and then want to switch to the hierarchydisplay, you first need to execute the Save function.