RViz bus error

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Hi everyone,

I have Ubuntu 14.04 and ROS Indigo (binary install).

I recently ran into a strange problem upon launching my MoveIt demo.launch file.

Here is the error message :

Got bus address:  "unix:abstract=/tmp/dbus-cQ74GDOPtt,guid=b4d59d77903e1ddcbea2229d584004da" 
Connected to accessibility bus at:  "unix:abstract=/tmp/dbus-cQ74GDOPtt,guid=b4d59d77903e1ddcbea2229d584004da"
Registered DEC:  true 
[rviz-4] process has died [pid 28494, exit code -11, cmd /opt/ros/indigo/lib/rviz/rviz -d /home/doshi/pr2_ws/src/trial/config/default.rviz __name:=rviz __log:=/home/doshi/.ros/log/b8008efe-b7dd-11e6-9afc-c1578ce90678/rviz-4.log].
log file: /home/doshi/.ros/log/b8008efe-b7dd-11e6-9afc-c1578ce90678/rviz-4*.log

I tried reinstalling Rviz (worked in this situation) but it didn't work for me.

sometimes it works even after showing this message but most of the timesRviz fails to start.

What could be the issue?

Thanks!