Hello, I am trying to load a custom vehicle in Project Chrono using JSON
files, but I am receiving a 0xC0000005: Access violation (*Null Pointer*)
error that I cannot solve.
The program always crashes when it reaches the vehicle.Initialize(...)
line. This indicates that the WheeledVehicle constructor failed, and the
vehicle object is being created as a null pointer (nullptr).
I believe the file references in my JSON files and my main.cpp code are
correct. My JSON file structure is as follows:
C:/Projects/vehicle_project/data/temp/vehicle/vehicle.json
Here is the relevant section of my main.cpp:
#include "chrono_vehicle/ChVehicleModelData.h"
// ... other includes ...
using namespace chrono;
using namespace chrono::vehicle;
int main() {
// SetDataPath points to the 'data' directory from the file tree above
const std::string vehicle_data_path =
"C:/Projects/vehicle_project/data";
chrono::vehicle::SetDataPath(vehicle_data_path);
// The vehicle JSON is called relative to the 'data' directory
const std::string vehfile = "temp/vehicle/Vehicle.json";
WheeledVehicle vehicle(vehfile, ChContactMethod::SMC, false, false);
// THE ERROR OCCURS ON THIS EXACT LINE
vehicle.Initialize(ChCoordsys<>(ChVector3d(0, 0, 0.6),
QuatFromAngleZ(0)));
// ... (rest of the code)
}
I would greatly appreciate it if you could tell me what is causing this
problem and how to solve it. Thank you.
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