Thread Subject: warning in the operation of RTW

Hello,
    I recieve the warning, when I am doing it.(The content is following). I need your help, thanks ahead.

>> make_rtw
??? Error using ==> RTW.makertw.ParseBuildArgs at 73
Unable to obtain current model name.

Error in ==> RTW.makertw.make_rtw at 13
  ParseBuildArgs(h, varargin);

Error in ==> make_rtw at 22
buildResult = h.make_rtw(varargin{:});