“Conversion to Dalvik format failed with error 1” on external JAR

Question

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

UNEXPECTED TOP-LEVEL EXCEPTION:
java.lang.IllegalArgumentException: already add

Answer 1

Updating Proguard to latest version solved it for me.

• My proguard path was C:\Program Files (x86)\Android\android-sdk\tools\proguard\
• I downloaded the new version from here
• and replaced both bin and lib folders

THANK GOD!