b0rked eclipse / IBM RAD

Neither Eclipse nor IBM RAD 8 work. When these IDE validate Java, they report false errors which blocks the build. Evidence:

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Even though I comment out the code it is reporting an error. I do clean, I do build, I make a completely new project from scratch, I switch between Eclipse and IBM RAD 8 and they couldn't even get code validation to work in these IDE:s. When I delete the code part it complains about, the IDe finds the code that it says is not there so the report is self-contradictory.

Solution

Normally you should not share workspaces between Eclipse variants. The .project configuration file is not designed for that.

Unzip a fresh Eclipse, make a fresh workspace and reimport your sources from your source repository. If that works, drop your current, faulty workspace.