no main manifest attribute in javase/javase.jar

[paradisebee]

I know nothing about java, and I merely follow the readme instructions to install zxing and the wrapper.
When I try a simple call to the decoder, this problem pops up:

no main manifest attribute in home/zxing/javase/javase.jar

Can anyone tell me how to solve this problem?

The simple code snippet:

from zxing import *
img = 'sample.png'

zx = BarCodeReader('/home/zxing')
barcode = zx.decode(img)

[paradisebee]

Solved with javase/target/javase-3.3.1-SNAPSHOT-jar-with-dependencies.jar.