![]() Also, Script Tracer works predominantly with server-side code, so it won’t show you Client Scripts or UI Policies that are running, although it will show UI Actions. The number of scripts that it will trace is by default 1000, but you can clear the current trace manually at any point, and even edit the default by changing the system property _line_limit. There are a few limitations with Script Tracer to be aware of. This is an alternative to going via the platform Session Debug and individual debugging options and allows you to easily see which debug options you currently have active. This means you can quickly see, activate or de-activate the various debug settings across the instance – all without leaving the debug window. View File – Brings you back to the platform view of the script, so you can edit it if required.įinally, although not technically part of Script Tracer, it is worth mentioning that in the Session Log tab you can easily get to the Settings which controls the debug settings and turn these on or off. Great for deeper investigation into why something might be happening. Two further buttons appear on each script tab – Debug Script and View Fileĭebug Script – Brings the script into the script debugger tab, which means you can immediately then start adding Breakpoints and Logpoints to interrogate the script further. Transaction – will show you the transaction log for this activity. Optionally a “Show Script” button allows you to see the script in full Script – will show you the actual script you are looking at, and specifically will jump to the line in the code that is changing the value. State – will show you the values changed, with an optional tick box to show you all the values on the record you are looking at When you select an individual script, you can see on the right-hand side three tabs – State, Script, Transaction. It displays in the main portion of the screen the scripts that have run during your transaction and will filter the script types so you can see what they are and quickly narrow them down (for example you might be sure it’s a business rule) and you can filter the table too if that is going to help. You can see along the top of the screen you can easily click between them. Script Tracer will open in a separate window, in the same window as Script Debugger and Session Log. Perform the transaction that is causing the issue.As an Admin, launch Script Tracer (System Diagnostics > Script Tracer).With Script Tracer you can shortcut a lot of this investigation now by doing the following: Maybe you’ve even run a code search in ServiceNow Studio for the field name, to try and find the script changing the value. Or maybe you’ve activated the script debugger and recreated the scenario, sifting through the Business Rules that are running and then using Breakpoints and Logpoints to analyze specific scripts even further. You perhaps would have gone straight into Business Rules for example and started looking there or watching the field to see if UI Transactions show any clues. Previously you might have started by analyzing what happens at the user experience side and using what you see to take a look further at different types of scripts. This can be especially frustrating if it is not obvious why this is happening and is getting in the way of your new piece of work for a client! ![]() ![]() ![]() If you are like me and have had to come back to an area of ServiceNow that you have not seen for a while, or maybe you’ve been asked by a client to enhance an existing part of the tool, you might have found that something is changing a value on a record and you do not know why. It will show you in that same window the part of the script that has caused the change and from there you can quickly see the full script, or even move to the script debugger to analyze it further. Once Script Tracer has been started and a transaction processed, it will allow you to see any values that have changed on the record and which script has caused this change. Script Tracer is a debugging tool that once activated will show you the ServiceNow scripts that are changing the record you are currently interacting with. A new platform feature of the ServiceNow Quebec release and something that I am very excited about is Script Tracer.
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