How To Fix TG437 - It may take a few minutes to cancel generation

SAP Error Message - Details

• Message type: E = Error

• Message class: TG - Messages for Upgrade Repository Switch

• Message number: 437

• Message text: It may take a few minutes to cancel generation

What causes this issue?

You have chosen to terminate generation.

System Response

Since generation is based on parallel processing, you cannot terminate
it immediately. The parallel processing finishes the termination
procedure for a small number of objects*. The background job that
administrates the parallel processing is then also terminated. This
procedure can take up to a few minutes, depending on the size of the
generation set, but it ensures that the generation is completed with a
consistent system status.
* To see the number of objects that will be processed before the
termination procedure is completed, choose the following: Job overview
-> Job log -> Consistent termination: still <(><<)>X> objects to be
generated.

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?

To avoid inconsistencies in your system, wait until the 'Job status:
completed' message indicates that the termination procedure has been
completed.
To generate the objects that were not generated before termination,
restart the transaction and choose Regenerate the objects of the last
run -> Restart.

Error message extract from SAP system. Copyright SAP SE.