I am running the following command to get my encrypted obb file for apk expansion.
jobb -d /home/manoj/Desktop/Test -o main.1.com.example.helloworld.obb -k \
Got the same problem and the workaround I found is to make an archive with a minimum size of 4mo. To add fake data to my small archive make it worked…
Issue : https://code.google.com/p/android/issues/detail?can=2&start=0&num=100&q=&colspec=ID%20Type%20Status%20Owner%20Summary%20Stars&groupby=&sort=&id=53878