Unity Pro has a Project Setting "System Diagnostics". This setting is made available to assist in debugging Unity projects and is selected (enabled) by default. Unity Pro continuously monitors the execution of the application code and the overall system operation for errors. If an error (such as a Divide by Zero in the application or an RI/O fault in the system) is detected during runtime, the appropriate System Bit and System Word will be set.

Additionally, by default, the error will be logged in the Diagnostics Buffer and can be viewed with the Diagnostic Viewer. The Diagnostics Viewer can be activated through the Tools selection on the Menu bar. This allows the user to isolate the problem area in the project.
To do this you:

1) Left click on the error message in the Diagnostic Viewer, detailed error information is provided in the lower Diagnostic Viewer window.
2) To go to the error, right click on the error message in the Diagnostic Viewer the select Initialize Error. This will open the appropriate window (Section if an instruction error) and highlight the problem area (instruction if application code).

Released for: Schneider Electric India