Ubuntu :: Running "at" Command Within A Cronjob ?

I ran into a problem when wanting to execute the "at" command from within a cron job.

Essentially, I have a daily crontab job that is launched at "the wrong time" (middle of night). I want to delay the execution of an import script until around 07:00. Editing the crontab is not an option (shared environment).

So I figured: Use the "at" command from within my script that is triggered (indirectly) by crontab: Code: #!/bin/bash at -f ./redo_import.sh -v 07:00 I know my script is started with `pwd` pointing at that same directory.

Running the "at" command directly from terminal works.

Running the script file above from terminal works.

But... when triggered from within crontab it does not work. I get exit code "1" from "at".

I searched man pages for "at" without much success. No mention of meaning of exit codes.

How to locate the sources of the "at" command.