i am trying to install the desktop version. everything goes fine until i use this command line : rosdep install --from-paths src --ignore-src --rosdistro indigo -y -r --os=debian:jessie it keeps told me this: ERROR: the following rosdeps failed to install apt: command [sudo -H apt-get install -y gazebo7] failed apt: Failed to detect successful installation of [gazebo7] and if try to install it by: sudo -H apt-get install -y gazebo7 it gives me: Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: gazebo7 : Depends: libgazebo7 (= 7.0.0+dfsg-2osrf1~jessie1) but it is not going to be installed Depends: libsdformat4 but it is not going to be installed Depends: libtbb2 but it is not installable Recommends: gazebo7-plugin-base but it is not going to be installed E: Unable to correct problems, you have held broken packages. very urgent, what should i do??? --- [Visit Topic](https://discourse.ros.org/t/please-help-trouble-install-ros-indigo-on-rasberry/1771/1) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: