[quote="robotdude, post:5, topic:4943"]
But every time we call the service we received an Error.
[/quote]
This is too vague, and sounds more like a ROS Answers question.
Not to steal anyone's opportunity to earn some cash, but this could be a classic ROS-on-multiple-network-hosts problem.
Make sure to either:
1. have a working DNS entry for all involved hosts, or
1. set `ROS_IP` on all involved hosts
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