Errors occurred during the build – java.lang.NullPointerException

I was trying to make a project clean today and started receiving this error. The “solution” to this as it doesn’t really give you any insight is to disable the Javascript Validator from Project -> Properties -> Builder.

In my case it solved the problem for one of the projects I had in my workspace, but I was still getting it in another project. What I did was to go the project that had been solved and copied the file “org.eclipse.wst.jsdt.core.javascriptValidator.launch” from the folder “.externalToolBuilders” to the other project that still had the issue and that did the trick.



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