Mach4 Logging and Log File
To access the Mach Logging select diagnostics and then Logging...
From this window we can Pin the window to stay on top or Start, Pause, Write log to disk or Clear the file written to the disk. You can also clear the log in the current dialog or save the current log to a file.
If you Write the log file to the disk you can find the file under the main Mach4 directory in a file named "GUI.log"