# Revision history [back]

### Error while loading shared libraries: cannot open shared object file: No such file or directory

It happens when I try to launch stageros:

rosrun stage stageros

ex.:

/opt/ros/electric/stacks/stage/bin/stageros: error while loading shared libraries: librostime.so: cannot open shared object file: No such file or directory


I try adding files to environmental variable:

export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/opt/ros/electric/stacks/stage/lib:/opt/ros/electric/stacks/perception_pcl/ros_comm/clients/cpp/roscpp/lib:/opt/ros/electric/stacks/perception_pcl/ros_comm/clients/cpp/roscpp_serialization/lib:/opt/ros/electric/stacks/perception_pcl/ros_comm/tools/rosconsole/lib  one after another... but got bored and frustrated (don't know how many I would have to add) It seems to me ROS doesn't know where his library files are. How to fix it? ### Error while loading shared libraries: cannot open shared object file: No such file or directory It happens when I try to launch stageros: stageros (on Ubuntu Oneiric, Ros electric desktop full): rosrun stage stageros ex.: /opt/ros/electric/stacks/stage/bin/stageros: error while loading shared libraries: librostime.so: cannot open shared object file: No such file or directory  I try adding files to environmental variable: export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/opt/ros/electric/stacks/stage/lib:/opt/ros/electric/stacks/perception_pcl/ros_comm/clients/cpp/roscpp/lib:/opt/ros/electric/stacks/perception_pcl/ros_comm/clients/cpp/roscpp_serialization/lib:/opt/ros/electric/stacks/perception_pcl/ros_comm/tools/rosconsole/lib


one after another... but got bored and frustrated (don't know how many I would have to add) It seems to me ROS doesn't know where his library files are. How to fix it?