Hello, The `argtypes` for `reset` here: https://github.com/uwgraphics/relaxed_ik_core/blob/d58c494b4b7519c1ec25fb21c9569ccc4d904d1b/wrappers/python_wrapper.py#L22 Should instead be: `lib.reset.argtypes = [ctypes.POINTER(RelaxedIKS), ctypes.POINTER(ctypes.c_double), ctypes.c_int]`