I'm programming HP11713A attenuator controller. First I writed one *.cpp file and I managed to controll the device the way that I wanted.
Now I'm writing the final version and using c++ classes (controller.cpp, controller.h and main.cpp). I really don't know what is wrong, because ibdev and ibclr functions are successfull, but when I'm trying to write to the attenuator controller with ibwrt I get these error messages:
iberr: 0 (EDVR)
ibctrl: -536215496