00:00:03 : Line 175 - Middleware exception error, script aborted.
Is this a question? Sure not much to go on...
What modifications did you make to the script?
A problem is a difference between what is perceived and what is desired, that
we want to reduce (Dewey 1933)
Middleware exception error is very common. There would be some other error too associated. Please give details.
Also some VUsers just randomly fail even at the start of the loadtest. I normally keep a few extra users in case this happens during the test.