Try this: ar t /home/rogerb/Downloads/google-musicmanager-beta_current_amd64.deb
Is the data.tar inside lzma compressed? If yes then this is a dupe of 868188. You can work around it in one of three ways 1. Installing with dpkg 2. Installing either the lzma or xz-lzma packages as they provide /usr/bin/lmza 3. setting up your own symlink such that /usr/bin/lmza points to /usr/bin/xz Remember to mark this as a duplicate if it is your issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/869685 Title: Always fails to install 3rd party debs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/869685/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs