system backup save output is causing snmpget triggered script not to run

I have a script, that exports the config and saves a backup.
If I run it on a schedule it’s fine
If I run it with snmpget then it dies
I suspect this is being caused by the output from system backup save

Saving system configuration
Configuration backup saved

This is with the latest 7.17rc2 build
The snmpget fails with:-
Failed to save system configuration backup
interrupted


If I comment out the system backup save then it’s fine (albeit slow compared to the time it takes to run if I run on the terminal

Useless words, without the script to check.

If the mechanic has to check the engine of your car,
do you describe to him what color the car is over the phone,
without taking the car to it to him to check it?
Does he fix it over the phone?