Currently, if one uses a standard setup (without a catkin install step), multisense.launch is located under "multisense_bringup/". During install, the launch file gets installed into ""multisense_bringup/launch/". This means that including this launch file in another, e.g.:
<include file="$(find multisense_bringup)/multisense.launch"/>
does not work when running a setup that has been created with catkin install.
Any reason for this peculiar choice of changing the location of launch files?