Shell script not kicking off

[swades]

Hello,
We are scheduling DataStage jobs from Crontab (Shell Script ).I have made entry in crontab to run script at perticular time but It is not executing.
what can be the reason ?
However I can execute the same manually.

Thanks for your time.

[Ultramundane]

Hello,
We are scheduling DataStage jobs from Crontab (Shell Script ).I have made entry in crontab to run script at perticular time but It is not executing.
what can be the reason ?
However I can execute the same manually.

Thanks for your time.

1. User Error
2. Cron daemon not running
3. Environment is not sourced correctly for cron execution