My front end use jsnlog.logger to catch all unhandled exceptions in js code and call a handler in the .Net backend to post the exception details. I have verified this and it is working fine. However in AppD business transactions, this is being shown as an error, not sure what to do with this.. this error is just polluting the whole reporting.. Found the below link, it is talking about something related to overwriting window.onerror event, not sure if this is the cause: https://docs.appdynamics.com/display/PRO21/Handle+the+window.onerror+Event Below screenshots shows what I see on my AppD reporting: So I am not clear on why it is being considered an error here. Any help would be highly appreciated here. ^ Edited by @Ryan.Paredez for an improved title and minor readability.  ... View more