Moderator: igrr
Maybe you can try to run IDE from a command shell and grabbing it output directly to a file, ie : "arduino > output.log"
On Linux, just open terminal, and start arduino IDE using something like "/home/user/arduino-1.6.5/arduino > output.log"
On Windows, open a CMD shell, although paths can differ (I'm not on Windows) and type something probably like "C:\Program Files (x86)\Arduino-1.6.5\arduino.exe > output.log"