I tried and was unable to reproduce this error. On exit script trigger working fine for me in WebDirect using Chrome 43.
do you have any incompatible steps (Web) in the script?
Hmm, chalk it up to developer error. I think maybe I forgot to save assigning the script before testing. Works perfectly.
I'm hugely impressed with WebDirect speed. That script in question around 90 lines of code updating 5 different fields separately. Executes in WebDirect in around 1/10 of a second. (my subjective timing).
The file is at PointInSpace on a dedicated server, around 1,000 miles away.
Thanks for your comments.