rospack find throws exception error

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

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.

I used the http://wiki.ros.org/lunar/Installatio... tutorial to install ros-desktop-full from source files. for my beaglebone board. Although its running fine on my desktop but on the board its throwing error.

Should i build the package again to avoid this error and if so what other packages and dependencies i need to update . Also i don't know how to remove the installed package as i used $catkin_make_install_isolated command and not the $catkin build command to build the work space so $catkin clean won't work.

Here are the contents of the package.xml file mentioned above in the error.

<?xml version="1.0"?>
<?xml-model href="http://download.ros.org/schema/package_format2.xsd" schematypens="http://www.w3.org/2001/XMLSchema"?>
<package format="2">
  <name>class_loader</name>
  <version>0.3.8</version>
  <description>
    The class_loader package is a ROS-independent package for loading plugins during runtime and the foundation of the higher level ROS "pluginlib" library. class_loader utilizes the host operating system's runtime loader to open runtime libraries (e.g. .so/.dll files), introspect the library for exported plugin classes, and allows users to instantiate objects of said exported classes without the explicit declaration (i.e. header file) for those classes.
  </description>
  <maintainer email="mikael@osrfoundation.org">Mikael Arguedas</maintainer>
  <author>Mirza Shah</author>
  <license>BSD</license>

  <url type="website">http://ros.org/wiki/class_loader</url>
  <url type="bugtracker">https://github.com/ros/class_loader/issues</url>
  <url type="repository">https://github.com/ros/class_loader</url>

  <buildtool_depend version_gte="0.5.68">catkin</buildtool_depend>

  <build_depend version_gte="0.3.3">cmake_modules</build_depend>

  <depend>boost</depend>
  <depend>libconsole-bridge-dev</depend>
  <depend>libpoco-dev</depend>
</package>