This happens when I dump and immediately try to load parameters for a node:
Hydro$rosrun dynamic_reconfigure dynparam dump /left_sa_camera_driver left_sa_camera_driver.yaml
Hydro$rosrun dynamic_reconfigure dynparam load /left_sa_camera_driver left_sa_camera_driver.yaml
error updating parameters: don't know parameter: groups
Hydro$
`left_sa_camera_driver` is a nodelet running in a nodelet manager together with other nodelets in this use-case. Otherwise, dynamic_reconfigure seems (largely) to work. I can change parameters via rqt_reconfigure, but some of them occasionally inexplicably oscillate between two different settings. Any hints on what might be the problem are appreciated.
Setup is Ubuntu 12.04/Hydro from .debs/AMD64
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