古老师您好!
我在做gazebo+moveit仿真时,配置config文件后,运行demo.launch 报下面的错误,这个应该怎么解决呢谢谢
load_parameters: unable to set parameters (last param was [/move_group/allow_trajectory_execution=True]): cannot marshal None unless allow_none is enabled
Traceback (most recent call last):
File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/__init__.py", line 332, in main
p.start()
File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/parent.py", line 300, in start
self.runner.launch()
File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/launch.py", line 662, in launch
self._setup()
File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/launch.py", line 649, in _setup
self._load_parameters()
File "/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/launch.py", line 341, in _load_parameters
r = param_server_multi()
File "/usr/lib/python2.7/xmlrpclib.py", line 1006, in __call__
return MultiCallIterator(self.__server.system.multicall(marshalled_list))
File "/usr/lib/python2.7/xmlrpclib.py", line 1243, in __call__
return self.__send(self.__name, args)
File "/usr/lib/python2.7/xmlrpclib.py", line 1596, in __request
allow_none=self.__allow_none)
File "/usr/lib/python2.7/xmlrpclib.py", line 1094, in dumps
data = m.dumps(params)
File "/usr/lib/python2.7/xmlrpclib.py", line 638, in dumps
dump(v, write)
File "/usr/lib/python2.7/xmlrpclib.py", line 660, in __dump
f(self, value, write)
File "/usr/lib/python2.7/xmlrpclib.py", line 719, in dump_array
dump(v, write)
File "/usr/lib/python2.7/xmlrpclib.py", line 660, in __dump
f(self, value, write)
File "/usr/lib/python2.7/xmlrpclib.py", line 741, in dump_struct
dump(v, write)
File "/usr/lib/python2.7/xmlrpclib.py", line 660, in __dump
f(self, value, write)
File "/usr/lib/python2.7/xmlrpclib.py", line 719, in dump_array
dump(v, write)
File "/usr/lib/python2.7/xmlrpclib.py", line 660, in __dump
f(self, value, write)
File "/usr/lib/python2.7/xmlrpclib.py", line 664, in dump_nil
raise TypeError, "cannot marshal None unless allow_none is enabled"
TypeError: cannot marshal None unless allow_none is enabled
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