appgrid.py crashed with subprocess.CalledProcessError in check_output(): Command '['dpkg-deb', '-c', '/home/username/Downloads/mdc_0.5-1_i386.deb']' returned non-zero exit status 2

I was trying to get a download app from source forge who was using the aarnet server. It stopped at 6%,then all this came up. The app was music download center.

ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: appgrid 0.199 [origin: LP-PPA-appgrid-stable]
ProcVersionSignature: Ubuntu 3.13.0-38.65-generic 3.13.11.8
Uname: Linux 3.13.0-38-generic i686
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: i386
CrashDB: {"impl": "launchpad", "project": "appgrid"}
CurrentDesktop: Unity
Date: Sat Nov 1 12:36:41 2014
EcryptfsInUse: Yes
ExecutablePath: /usr/share/appgrid/appgrid.py
InstallationDate: Installed on 2014-08-02 (90 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release i386 (20140722.2)
InterpreterPath: /usr/bin/python3.4
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/share/appgrid/appgrid.py /home/username/Downloads/mdc_0.5-1_i386.deb
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/share/appgrid/appgrid.py', '/home/username/Downloads/mdc_0.5-1_i386.deb']
SourcePackage: appgrid
Title: appgrid.py crashed with subprocess.CalledProcessError in check_output(): Command '['dpkg-deb', '-c', '/home/username/Downloads/mdc_0.5-1_i386.deb']' returned non-zero exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo