How to solve it? "Dex Loader SecurityException: Unable to find field for dex.jar"

Question

All project worked fine

But suddenly

This problem occurs all project...

I can not run all project.

Answer 1

This occurs after the recent update for the Eclipse Plugin(s) for Android. In Eclipse, use Window -> Android SDK Manager, and update your Android SDK Installation. The error message will disappear when you restart eclipse.

Answer 2

Or, if you're like me and have both Eclipse 3.7.x and Eclipse 4.2.x installed, you will need to update the Android SDK Installation on both of them if you want both of them to work (despite the fact that I used the same installation directory).

Updating the Android SDK install is something of a beast in and of itself; I was having some issues installing API 17, but I found that clearing the SDK Manager cache alleviated those problems.

Answer 3

I still had the issue following aanno's answer, so what I had to do after his step was to switch my workspace (File->Switch Workspace) to another folder, apply that and then immediately go back and re-select my original workspace location. Once I did that and eclipse returned, my workspace was back up and running.