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2015-02-11 12:43:47 -0500 commented question Can't find model database when roslaunch'd, but can find it when Gazebo is run by itself.

Can you post the contents of your launch file, or at least the part of the launch file which launches gazebo?

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2013-07-17 17:32:27 -0500 commented answer installing gazebo_ros_pkgs for groovy

That should be `VERBOSE=1 catkin_make`.

2013-07-17 12:59:38 -0500 answered a question Gazebo 1.9 - Fatal error: pcl/conversions.h: No such file or directory.

pcl/conversions.h is part of PCL, but you need PCL version 1.7 to build against this.

There is a hydro package for PCL 1.7.0-rc2 called ros-hydro-pcl. If you install/upgrade that package (sudo apt-get install ros-hydro-pcl) it should fix your problem.

The pcl_conversions package, which the gazebo_ros_pkgs depends on now has a versioned dependency on PCL, so this shouldn't happen in the future:

https://github.com/ros-perception/pcl_conversions/commit/b4071f4aa65e9a32908b2dacbdc8e15362d1209b#L1R23