The Extended Variable Logging will be be enabled and shown when critical errors are detected during variable replacement.
Variables and/or IP variables can sometimes be complex to use and difficult to debug. If an error is found during processing, extended variable logging will be enabled. The logging window will automatically be shown once the configuration has been generated, or it can be viewed from the menu View -> Open Extended Variable Log.
If an error is found, configurations generated will also display the original variables where the errors have been found.