how to solve this error Warning [parser.cc:759] XML Attribute[xmlns:xacro] in element[sdf] not defined in SDF, ignoring
when i want to run the simulator with code gazebo --verbose ~/ardupilot_gazebo/worlds/iris_arducopter_runway.world it shows the error [Msg] Waiting for master. [Msg] Waiting for master. [Msg] Connected to gazebo master @ http://127.0.0.1:11345 [Msg] Publicized address: 192.168.150.130 [Msg] Connected to gazebo master @ http://127.0.0.1:11345 [Msg] Publicized address: 192.168.150.130 Warning [parser.cc:759] XML Attribute[xmlns:xacro] in element[sdf] not defined in SDF, ignoring. [Msg] Loading world file [/home/hwanyong/ardupilot_gazebo/worlds/iris_arducopter_runway.world] VMware: vmw_ioctl_command error Invalid argument. what should i do to solve this proble??