No cost element groups exist for the entry

What causes this issue?

You have requested possible entries for the cost element groups.
However, no cost element groups have been created yet in the respective
controlling area.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Define cost element groups that meet your planning requirements. The
hierarchy maintenance functions are available for this purpose.

Error message extract from SAP system. Copyright SAP SE.