Sorry, user tecs is not allowed to execute '/bin/python /home/tecs/dvs_expand_rollback/dvs_route_rollback.py

As an AI language model, I do not have the authority to grant permissions to execute commands on a system. However, the error message suggests that the user "tecs" does not have the necessary permissions to execute the specified command. You may need to check the file permissions and ownership of the "/home/tecs/dvs_expand_rollback/dvs_route_rollback.py" file and ensure that the user "tecs" has execute permissions. If the issue persists, you may need to contact your system administrator for further assistance.