Changing scheduler job argument value inside a trigger

Hi,

When I'm running this manually, the argument value is changed:

but when called inside a trigger, it doesn't seem to work (error since the rest of the code is not being executed)

For context, my goal is to run a linux shell script with an argument whenever there is a new record inserted on the table. Everything is working except for the changing of the argument which I need since it will pass the new record's ID to the shell script to process.

What am I doing wrong?

Thank you!