This program can only be started in the background

What causes this issue?

You tried to start the program directly (online).

System Response

Starting the program failed.

How to fix this error?

As the program is expected to run for a long time, it can only be
scheduled for execution in the background. For this reason, use the
startup program RDDFINFO (and function button F5) to start the object
analysis. The program also allows job flow control.

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.