Android ZBar Exception only with Jenkins build

I have an android project with a QR scan activity. I use the ZBar library for this: http://sourceforge.net/projects/zbar/files/AndroidSDK/ If the project is built on a PC or Mac with exlipse, the app works fine. If it's build by jenkins (same source from git) the app crashes. The Exception I get is: ``` at controller.gui.activity.QRScanActivity.onCreate(Unknown Source) at android.app.Activity.performCreate(Activity.java:4465) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) at android.app.ActivityThread.access$600(ActivityThread.java:123) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4424) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.NoSuchFieldError: no field with name='peer' signature='J' in class Lnet/sourceforge/zbar/ImageScanner; at net.sourceforge.zbar.ImageScanner.init(Native Method) at net.sourceforge.zbar.ImageScanner.<clinit>(Unknown Source) ... 16 more ``` I used the demo app for a base. Is this a Jenkins config problem? The Zbar library is not just a jar file, it's a C library with jni. So I have a jar file and 3 folders (for different architectures I think) and they have a libiconv.so and a libzbarjni.so files.