In my Android application in Eclipse I get the following error.

UNEXPECTED TOP-LEVEL EXCEPTION:

java.lang.IllegalArgumentException: already added: Lorg/xmlpull/v1/XmlPullParser;

....

Conversion to Dalvik format failed with error 1

This error only appears when I add a specific external JAR file to my project. I searched for a long time for the possible solution, but none of the possible solutions work. I even tried to change to Android 1.6 instead of 1.5 (the current version I use).