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error when running executable file on UWSim

asked 2016-06-01 14:55:10 -0500

ZYS gravatar image

updated 2016-06-02 09:18:18 -0500

The example code is including three files which are header file, member function file and main file. And the code is copied from the textbook.

I put the header file on the path:/home/gupta/catkin_ws_2/src/underwater_simulation/uwsim/include/uwsim. 
I put the member function file on the path /home/gupta/catkin_ws_2/src/underwater_simulation/uwsim/src. 
I put the main file on the path: /home/gupta/catkin_ws_2/src/underwater_simulation/underwater_vehicle_dynamics/src

Then I add something in the CMakeList.txt:

add_executable(mainstudent /home/gupta/catkin_ws_2/src/underwater_simulation/underwater_vehicle_dynamics

target_link_libraries(mainstudent uwsim ${catkin_LIBRARIES} ${Boost_LIBRARIES} ${BULLET_LIBRARIES})


header file:

class Student
    void display();
    int num;
    char name[20];
    char sex;

function member file:

#include <iostream>
#include "uwsim/student.h"
using namespace std;

void Student::display()

main file:

#include <iostream>
#include "uwsim/student.h"

int main()
    Student stud;
    return 0;

There is no error when compiling the code. However, there is error when running the executable file on the terminal. And the error is shown below:

Loading SimulatedDevices plugin: 'DredgeTool_Factory'
Loading SimulatedDevices plugin: 'ForceSensor_Factory'
Loading SimulatedDevices plugin: 'SimDev_Echo_Factory'
terminate called after throwing an instance of 'pluginlib::LibraryUnloadException'
  what():  According to the loaded plugin descriptions the class ForceSensor_Factory with base class type uwsim::SimulatedDeviceFactory does not exist. Declared types are `enter code here`DredgeTool_Factory ForceSensor_Factory SimDev_Echo_Factory
Aborted (core dumped)

Any suggestion? Thanks so much.

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Please format your question properly: use the Preformatted Text button (with 101010 on it) for all code and console copy/pastes. Right now it's unreadable.

gvdhoorn gravatar image gvdhoorn  ( 2016-06-01 15:38:35 -0500 )edit

1 Answer

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answered 2016-06-06 03:08:15 -0500

Javier Perez gravatar image


Having a look at your code files, it seems you are mixing the files in different packages. I'm not sure if something like that is supposed to work but I think there is no need to do it. So why are you putting header and member files in one package (uwsim) and the main file in a different one (underwater_vehicle_dynamics)?. Beyond that the CMakeLists is from uwsim package?, you shouldn't call a file from a different package in a CMakeList (first two lines). Finally if student classes do not work with uwsim core, as far as I can see they do not include a single file from it, there is no need to add them to the same library, I would create a new one for them or even a new package for them and left unmodified the uwsim package.

Anyway code from the new files is simple enough to work, problem is in the way you are building them.

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Asked: 2016-06-01 14:55:10 -0500

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Last updated: Jun 06 '16