Asset selections only allowed in test run

What causes this issue?

You are <ZH>not</> allowed to restrict to certain assets with a real
posting run.

System Response

Processing <ZH>not</> possible because of errors in the parameters.

How to fix this error?

Start the program again with the appropriate parameters.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.