Hi, i have installed few packages and trying to build them using the "make" command and i am getting a linking error.... the code:

"Linking CXX shared library ../lib/libactionlib.so /usr/bin/ld: cannot find -lros collect2: ld returned 1 exit status make[3]: * [../lib/libactionlib.so] Error 1 make[3]: Leaving directory /home/maneesh/ros_stacks/common/actionlib/build' make[2]: *** [CMakeFiles/actionlib.dir/all] Error 2 make[2]: Leaving directory/home/maneesh/ros_stacks/common/actionlib/build' make[1]: [all] Error 2 make[1]: Leaving directory `/home/maneesh/ros_stacks/common/actionlib/build' make: ** [all] Error 2"

how do i go about and eliminate the error?

regards,

maneesh

Hi everyone,

Well, i am trying to launch gazebo simulator on my system along with an object of Kuka Youbot in it. The "empty_world" command seems to be working fine and the Gazebo launches successfully. the error occurs when i try to introduce a object in it, but typing the following commands:
1. roscore in one TW 2. roslaunch youbot_description youbot_arm_description.launch in another TW and 3. roslaunch youbot_description youbot_arm_publisher.launch in an other TW

The first two commands seems to be working fine, that is the process runs successfully, but as soon as i run the third command in a TW, the gazebo runs successfully for about 5 seconds and the process dies automatically closing the Gazebo simulator and throws the following error:

"Main simulation loop failed /home/youbot/ros_stacks/simulator_gazebo/gazebo/build/gazebo/server/controllers/ControllerFactory.cc:99 : Exception: Failed to load libgazebo_ros_controller_manager.so: libgazebo_ros_controller_manager.so: cannot open shared object file: No such file or directory

Service call failed: transport error completing service call: unable to receive data from sender, check sender's logs for details spawning success None [gazebo-2] process has died [pid 2498, exit code -11]. log files: /home/youbot/.ros/log/e142418c-136d-11e1-ad57-002682c60600/gazebo-2.log [youbot_gazebo_model-3] process has finished cleanly. log file: /home/youbot/.ros/log/e142418c-136d-11e1-ad57-002682c60600/youbot_gazebo_model-3.log"

I have no clue how to proceed with this, so, please help me with this issue. Thank you in advance....

regards,

Maneesh

Sounds like you redefined $ROS_PACKAGE_PATH so it no longer includes the stacks of the ROS distribution. That could explain your import failure.

The root problem seems to be misunderstanding environment variables, so here is the corrected export command, as explained in several comments below:

export ROS_PACKAGE_PATH=/home/maneesh/ros_stacks:$ROS_PACKAGE_PATH

hey,

i am getting a new type of error which i am not aware of how to resolve it.... if anyone knows how to reolve this issue please let me know... the error message i am receiving is :

youbot@youbot-laptop:~$ roslaunch
Traceback (most recent call last):
  File "/opt/ros/diamondback/ros/bin/roslaunch", line 2, in <module>
   from ros import roslaunch
  File "/opt/ros/diamondback/ros/core/roslib/src/ros/__init__.py", line 57, in __getattr__
    return __import__(name)
ImportError: No module named roslaunch

if anyone has any idea regarding this please let me know...thanks in advance....

regards,

Maneesh

Hi,

I have problems regarding the command "$roscore".... I am very much new to Ubuntu and ROS, so i have no idea what i am suppose to do in-order to get rid of this error message i have posted below:

**SUMMARY

NODES No handlers could be found for logger "roslaunch" WARNING: IP address 127.0.1.1 for local hostname 'youbot-laptop' does not appear to match any local IP address (127.0.0.1,192.168.2.2). Your ROS nodes may fail to communicate. Please use ROS_IP to set the correct IP address to use. starting new master (master configured for auto start) Roslaunch got a 'No such file or directory' error while attempting to run: /opt/ros/diamondback/ros/bin/zenmaster --core -p 11311 __log:=/home/youbot/.ros/log/7e9ec426-007e-11e1-99f6-002682c60600/master.log Please make sure that all the executables in this command exist and have executable permission. This is often caused by a bad launch-prefix. [master] process has died**

So, if anyone can please help me in resolving this issue, it would be grateful.... I am in a hurry to show this result as my deadline is nearby......

Thank you in advance...

Regards,

Maneesh

and yes in addition, i performed these two operations:

$ export ROS_HOSTNAME=localhost $ export ROS_MASTER_URI=http://localhost:11311

and the following error message occurred:

**SUMMARY

NODES starting new master (master configured for auto start) No handlers could be found for logger "roslaunch" Roslaunch got a 'No such file or directory' error while attempting to run: /opt/ros/diamondback/ros/bin/zenmaster --core -p 11311 __log:=/home/youbot/.ros/log/81d48234-0083-11e1-8a52-002682c60600/master.log Please make sure that all the executables in this command exist and have executable permission. This is often caused by a bad launch-prefix. [master] process has died**

but after opening a new terminal window and type $roscore, i get the first error message again.... hope these information are sufficient for you to help me in resolving this issue....thank you