Failed to Open camera in another class

[SJavad]

Describe what you want to implement and what the issue & the steps to reproduce it are:

I want to Open the camera in another class.
when I try open camera in class constructor, the camera was not opened and throw this exception:
terminated called after throwing an instance of 'GenICam_3_1_Basler::pylon::runtimeException'
but when I create Instance of camera in main function, I can open camera and capture frames without any problem.
I'm writing code in c++
here is the code of the class:

class CameraService
{
private:
         CInstantCamera *camera;
         CImageFormatConverter *formatconverter;
         CPylonImage *pylonimage;
public:
         CameraService(CameraParamters &CameraParameter);
         ~CameraService();
};
CameraService::CameraService(CameraParameters &CameraParameter)
{
         CInstantCamera camera(CTlFactory::GetInstance().CreateFirstDevice()); // this line throw an exception
         std::cout << "Using Camera: " << camera.GetDeviceInfo().GetModelName() << std::endl;
}

Is your camera operational in Basler pylon viewer on your platform

Yes

Hardware setup & camera model(s) used

AMD64 CPU
Ubuntu
RAM 16 GB
Camera: Ace2040-55um
USB 3.0

Runtime information:

terminated called after throwing an instance of 'GenICam_3_1_Basler::pylon::runtimeException'

[SMA2016a]

Just wanted to clarify that the issue described isn't actually related to pypylon.

you need to call Pylon initialize() in constructor and Terminate() in destructor.