I just moved to a new MacBook with El Capitan and trying to set up my crontab to do backup tasks. Here is how I have it set up (via crontab -e)

40 7 * * * /Users/myusername/daily.sh "daily tasks run 7:40a"

Daily.sh looks like this

open -b com.apple.terminal ~/backupThing1.sh
open -b com.apple.terminal ~/backupThing2.sh

I have it set up this way so I see the terminals come up and can respond to some inputs and password prompts.

Anyway, this task fails with the following messages:

LSOpenURLsWithRole() failed for the application /Applications/Utilities/Terminal.app with error -600 for the file /Users/myusername/backupThing1.sh.
LSOpenURLsWithRole() failed for the application /Applications/Utilities/Terminal.app with error -600 for the file /Users/myusername/dailyThing1.sh.

I have verified that these scripts are owned by myusername and are executable. What am I missing?