$rospack find throws exception error

[justdoGIT]

rospack find is giving runtime errors on my beaglebone board. Other rospack commands are running fine like rospack depends.
Here is the screenshot

and here is the error message :
debian@beaglebone:~/catkin_ws$ rospack find
terminate called after throwing an instance of 'rospack::Exception'
what(): error parsing manifest of package class_loader at /home/debian/ros_catkin_ws/install_isolated/share/class_loader/package.xml
Aborted

also after writing $rosrun and pressing tab it is throwing exception error written below :

debian@beaglebone:~/catkin_ws$ rosrun terminate called after throwing an instance of 'rospack::Exception'
what(): error parsing manifest of package class_loader at /home/debian/ros_catkin_ws/install_isolated/share/class_loader/package.xml

although $ rosrun <pkg_name> <node_name> is running completely fine when typing the whole command without using tab
with using tab the console is like this ;

debian@beaglebone:~/catkin_ws$ rosrun ros_o3d_wall_f find: '': No such file or directory
o3d-find: '': No such file or directory
find: '': No such file or directory

o3d-pub o3d-sub

here i pressed tab after $rosrun ros_o3d_wall_f . And then there was this line added "find: no such file or directory" then again i pressed tab and line added was o3d-find: no such file or directory and when i pressed tab for the third time it should me the two nodes o3d -pub and o3d-sub.
can someone explain me this anomalous behavior.
i have installed ros on my board from source files as apt-get repository was unable to find it.

[dirk-thomas]

Since the error message mentions a problem parsing the file /home/debian/ros_catkin_ws/install_isolated/share/class_loader/package.xml please post the content of that file.

[dirk-thomas]

i have installed ros on my board from source files as apt-get repository was unable to find it.

Without knowing what you have done we can't give you any helpful feedback. Please describe your exact steps / which tutorial you have followed and what happened when it "was unable to find it". Also this question is different from the rospack problem and might be better suited for answers.ros.org.

[dirk-thomas]

Closing since the same question has been double posted here: https://answers.ros.org/question/278733/rospack-find-throws-exception-error/

Please provide the requested information on answers.ros.org.

[dirk-thomas]

See #77.