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I’m using intelliJ IDEA version 9.0.1 build #IU 93.94 with JDK 1.6.0_17.
This error comes up at compile time. It only happens sometimes and sometimes when I hit File|Invalidate Caches and restart intelliJ, my project will build successfully.
I have absolutely no idea what to do about this, but it is slowing my progress down quite a bit. Any help would be much appreciated.
Thanks in advance.
You need to remove the system directory manually including the compiler caches, then rebuild the project.
USERPROFILE\.IntelliJIdeaXX\system on Windows, ~/Library/Caches/IntelliJIDEAXX on Mac OS X, ~/.IntelliJIdeaXX/system on Linux.
XX will be 90 for your IDEA version.