XML Publisher Report Bursting Program - Error

Hi Team,

We have two applications users USER1 and USER2 and we are running XML Publisher Report Bursting Program from a custom program to send necessary emails to the INTERNAL departments.

In TEST instance we are facing the issue is, this program is working from USER2 and same program is error from USER1.

Didn't get any error message in the Concurrent program LOG file.

question 1: Why system behaving like this erroring from one user and working from another user.

question 2: How to see the Error message apart from concurrent program LOG file.

Regards/Narva