FRCSIM Gazebo Model Problem

[garystjean]

When using FRCSIM/Gazebo it works OK for a while, then the robot falls through the floor. Here is what I've been trying:

1) Download the 2016 world model for Gazebo from here: http://first.wpi.edu/FRC/roborio/rel.../frc2016.world

2) Installed/Configured FRCSIM and WPILIB Eclipse plugin per using the frcsim-installer.sh per wpi screensteps

3) Using the GearsBot sample code, I create a Java program and I am able to get the program running

4) I load up the frc2016.world file with frcsim and then I manually add the Gearsbot model to the world

5) After I drive it around successfully for a couple minutes the robot appears to drop through the floor, so only the top 1/2 of the robot is visible.

6) At this point there does not appear to be a way to use the robot, i need to delete it from the Gazebo world then re-insert a new Gearsbot model into the world.

7) I've attached a couple screenshots that show the before/after images.

Success
https://drive.google.com/file/d/0BxY...ew?usp=sharing

Failure
https://drive.google.com/file/d/0BxY...ew?usp=sharing

Has anyone else been having this problem? Is it a problem with the frc2016.world file?

Thanks
-Gary