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roswtf- error * service [/gazebo/set_logger_level] appears to be malfunctioning:

roswtf command gave following errors:

dteja@teja:~$ roswtf WARNING: Package "ompl" does not follow the version conventions. It should not contain leading zeros (unless the number is 0). Loaded plugin tf.tfwtf

No package or stack in context

Static checks summary:

No errors or warnings

Beginning tests of your ROS graph. These may take awhile... analyzing graph... ... done analyzing graph running graph rules... ERROR: connection refused to [http://teja:41041/] ... done running graph rules

Online checks summary:

Found 2 warning(s). Warnings are things that may be just fine, but are sometimes at fault

WARNING The following node subscriptions are unconnected: * /gazebo: * /clock

WARNING The following nodes are unexpectedly connected: * unknown (http://teja:37571/)->/rosout (/rosout)

Found 3 error(s).

ERROR /use_simtime is set but no publisher of /clock is present ERROR Could not contact the following nodes: * /gazebo

ERROR Errors connecting to the following services: * service [/gazebo/set_logger_level] appears to be malfunctioning: Unable to communicate with service [/gazebo/set_logger_level], address [rosrpc://teja:51809] * service [/gazebo/get_loggers] appears to be malfunctioning: Unable to communicate with service [/gazebo/get_loggers], address [rosrpc://teja:51809]

Can someone say how to solve this issue? Thanks in advance.

roswtf- error * service [/gazebo/set_logger_level] appears to be malfunctioning:

roswtf command gave following errors:

dteja@teja:~$ roswtf
WARNING: Package "ompl" does not follow the version conventions. It should not contain leading zeros (unless the number is 0).
Loaded plugin tf.tfwtf

tf.tfwtf No package or stack in context

context ================================================================================ Static checks summary:

summary: No errors or warnings

warnings ================================================================================ Beginning tests of your ROS graph. These may take awhile... analyzing graph... ... done analyzing graph running graph rules... ERROR: connection refused to [http://teja:41041/] ... done running graph rules

rules Online checks summary:

summary: Found 2 warning(s). Warnings are things that may be just fine, but are sometimes at fault

fault WARNING The following node subscriptions are unconnected: * /gazebo: * /clock

/clock WARNING The following nodes are unexpectedly connected: * unknown (http://teja:37571/)->/rosout (/rosout)

(/rosout) Found 3 error(s).

error(s). ERROR /use_simtime is set but no publisher of /clock is present ERROR Could not contact the following nodes: * /gazebo

/gazebo ERROR Errors connecting to the following services: * service [/gazebo/set_logger_level] appears to be malfunctioning: Unable to communicate with service [/gazebo/set_logger_level], address [rosrpc://teja:51809] * service [/gazebo/get_loggers] appears to be malfunctioning: Unable to communicate with service [/gazebo/get_loggers], address [rosrpc://teja:51809]

[rosrpc://teja:51809]

Can someone say how to solve this issue? Thanks in advance.