The easiest way to find the product log file is the Help menu, the item name would depend on the IDE version and OS:
- Show Log in Explorer
- Show Log in Finder
- Show Log in Konqueror/Nautilus
- Reveal Log in Explorer
- Reveal Log in Finder/Finder/Nautilus
Can't access Help menu, how do I find the log file manually?
IntelliJ IDEA External Build logs
When using external make IDE starts a separate process for compilation, this process writes logs into the %idea.log.path%\build-log\build.log file. Attach this file as well if you are reporting problems related to compilation and external build is enabled.
For the more verbose logging edit build-log.xml file (located in the same directory), change <priority value="info" /> to <priority value="debug" />.
Since IDEA 14.1 compiler logging is configured via build-log.properties file instead of the .xml file, change log4j.rootLogger=info, file to log4j.rootLogger=debug, file .
It's recommended that you delete the existing log files, start the IDE, reproduce the problem, then attach all the produced log files.