Ajax Truclient 12.0 multiple iterations issue

My truclient script is supposed to do 24 iterations of the steps in Action part with login and logout inside Init and End sections. The script works fine for 24 iterations in interactive mode but in load mode it fails at the first step inside action after around 16 or 17 iterations. The error snap of this step shows just a blank screen. Also, the subsequent iterations fail too with the same blank screen page. In replay statistics I could see the connection is shown as shutdown at the error step. Pls help this is very urgent.
I can't share the scripts here due to security reasons.