Error Unable to execute dex Multiple dex files define

Question

i receive the following error and have to restart Eclipse ... and clean again.

Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define
     Lcom/jstun/core/attribute/MessageAttributeInterface;

com.jstun.core... is a part of my src folder, of course i can't remove it. And even if i remove that package, another package will show up as an error like:

Unable to execute dex: Multiple dex files define
     Landroid/support/v4/app/ActivityCompatHoneycomb;

I've seen this error since updating to ADT 15, i'm using Eclipse Galileo on Ubuntu Do you have any idea? Thanks for any reply!

Answer 1

Hello @kartik,

The Solution for me was just to do following things:

1. ->lib directory in your project and delete any multiple elements.
2. Project->Properties->Java build Path and delete any Dependency Library was added automatically and not by you! ->Apply
3. Restart Eclipse IDE
4. Now Clean the project.
5. Run/Debug on Device/Emulator the project 

Hope this work!!