Program &1 will not be generated since it is not activated

What causes this issue?

The program &V1& belongs to the package &V2&, which is not activated in
this system.
This is an information message, not an error.

System Response

The program &V1& will not be generated.

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.