Hi Priya,
Existence of code in the include does not mean that the exit is active.
The exit will be called only when CMOD is activated. You may check in the production environment if it is active or not . You can see if someone has deactivated by last changed by and check with the person for the reason for de-activation.
If you are not sure if there was any other custom enhancement you can search it by doing F4 and click on the + option and provide the Exit details.
Thanks and Regards,
Sriranjani Chimakurthy.