连接时出现异常… …/Sender.py 第 1092 行（主） #702

Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 801, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/threading.py", line 754, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/home/pi/Desktop/CNC/bCNC/Sender.py", line 1092, in serialIO
    CNC.vars["mx"] = float(d['MPos'][0])
KeyError: 'MPos'```

connecting with a version from September 2017 is working fine.