Enter the relevant object module

What causes this issue?

When you create an object variant, you must enter the object module
from which this variant is to be created. However, you did not enter an
object module.

System Response

The variant cannot be created.

How to fix this error?

Enter the object module for which you want to create a variant.

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.