You have not defined a season

What causes this issue?

You have not defined a season in the rate facts, the rate category
facts or the installation facts.

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?

Maintain a season period in the rate category facts or in the
installation facts.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.