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1 | initial version |
What version of mavros installed? Because mavros_msgs introduced in version 0.14 (current stable 0.15).
2 | No.2 Revision |
What version of mavros installed? Because mavros_msgs introduced in version 0.14 (current stable 0.15).
So perhaps you use old release, where all messages in packages itself mavros/mavros_extras. I recommend to build from source, but for that you must update mavlink package (from shadow repo: ros-jade-mavlink)