Annoying "Errors running builder 'Android Pre Compiler' on project" dialog [duplicate]

Question

Possible Duplicate:
Eclipse / Android : “Errors running builder ‘Android Pre Compiler’ on project…”

I keep getting the following error pop-up every now and then on my Android project on Eclipse 4.2.1:

Title:
'Building workspace has encountered a problem. Errors occurred during the build.

Message:
Errors running builder 'Android Pre Compiler' on project 'xxxx'. java.lang.NullPointerException

FYI, my project has .svn repositories and uses 4 external libraries (that seem to be fine, no errors). I'm using Android 4.2.

What could be the issue here? :(

Answer 1

Someone found the answer! In my case, it was the svn extension-less files that were causing the problems. See solution here.