Failure in unit cache map load - GWT

If you change the value of your <module rename-to='<appname>'> in .gwt.xml it will give the same error :) but then you can just delete your gwt-unitCache and all is ok :)

IntelliJ IDEA stores GWT cache files in other location than <ProjectFolder>/gwt-unitCache, which is a default directory for a cache if you are using, for example, Eclipse with GPE (Google Plugin for Eclipse).

In IDEA, GWT cache should be located by default at <your_home>/.IntelliJIdea12/system/gwt (IntelliJ IDEA 12, Linux). For other operating systems you can check Project and IDE Settings.

If you delete mentioned gwt folder contents, IntelliJ will create a new cache, which in turn might solve your Failure in unit cache... (and similar Unable to read from byte cache) problem.

I had the same problem with Eclipse.

Unfortunately looks like the only solution is the one given by Crowlix. I tried to delete gwtCache and Temp files, but nothing worked.

The problem only got fixed when deleting the entire project and re-importing it.