Steps to reproduce:
1. Have more than one table in your generator screen of the TDM portal.
2. Make the table repeat count for one of them as 0.
3. Enter all the mandatory details on the screen and click on publish button.
4. Go to Submitted requests, and under generator, check for your job ID.
5. The job should have failed. (You can click on the download button to get the zip file containing the log folder)