Not able to run image_transport from cpp code: ` Segmentation fault (core dumped)`

edit

I included well image_transport in both my CMake file and packake.xml as follows:

find_package(catkin REQUIRED COMPONENTS
  cv_bridge
  image_transport
  roscpp
  rospy
  std_msgs
  message_generation
  genmsg
  )

generate_messages(
  DEPENDENCIES
  std_msgs
  )

catkin_package(
  CATKIN_DEPENDS  cv_bridge image_transport roscpp rospy std_msgs message_generation
  )

....

and

<buildtool_depend>catkin</buildtool_depend>
 <build_depend>cv_bridge</build_depend>
  <build_depend>image_transport</build_depend>
  <build_depend>roscpp</build_depend>
 <build_depend>rospy</build_depend>
  <build_depend>std_msgs</build_depend>
  <build_depend>message_generation</build_depend>
   <run_depend>cv_bridge</run_depend>
  <run_depend>image_transport</run_depend>
  <run_depend>roscpp</run_depend>
  <run_depend>rospy</run_depend>
 <run_depend>std_msgs</run_depend>
  <run_depend>message_runtime</run_depend>
 <run_depend>message_generation</run_depend>
    <run_depend>image_transport</run_depend>

and in my .cpp file

#include <ros/ros.h>
#include <image_transport/image_transport.h>
.....
int main(int argc, char **argv)
{

  ros::init(argc, argv, "imagegraber");
  ros::NodeHandle nodea;

 image_transport::ImageTransport it(nodea);

image_transport::Subscriber sub = it.subscribe("/pg_15508342/image_raw", 1, imageCallback);


 ros::spin();
return 0;
}

Yet, I receive Segmentation fault (core dumped) when I run my code.... What could be the problem? The code crashes at image_transport::ImageTransport it(nodea);

Am also able to run image_transport with command line: rosrun image_transport republish..... Able also to use image_view, etc...