PID slider joint in gazebo 1.3 / 1.5

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Hi,

For the first issue using gazebo 1.3 most probably you are missing the GAZEBO PATHS to the plugin.

Here is an example how to add yout package plugin library:

$ export GAZEBO_PLUGIN_PATH=/<path>/your_package/lib:${GAZEBO_PLUGIN_PATH}

For the second issue when you run your code with gazebo 1.5, this might appear because your code could be built against the gazebo 1.3 libraries from groovy, that's why you get that error when you run the plugin.

To avoid this when you build your package you should comment out <depend package="gazebo"/> line from your manifest.xml file. Afterwards in the CMakeLists.txt file add the following lines to link against yout gazebo 1.5 libraries:

## link to gazebo libraries 
include (FindPkgConfig)
if (PKG_CONFIG_FOUND)
  pkg_check_modules(GAZEBO gazebo)
endif()
include_directories(${GAZEBO_INCLUDE_DIRS})
link_directories(${GAZEBO_LIBRARY_DIRS})

Cheers, Andrei