Can't modify Hector SLAM parameters at runtime (map_update_distance_threshold)

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Hi,

I'm trying to change an Hector SLAM parameter [/hector_mapping/map_update_distance_theshold] at runtime using the following command:

rosparam set /hector_mapping/map_update_distance_theshold X

However, I can't see any modification on the Hector SLAM behaviour when sending the command. I think that the parameters are checked only at initialisation time and not updated afterward.

Can anybody confirm this assumption ?

I would like to know if there is a way to change hector SLAM parameter while mapping is ongoing or if this option should be avoided.

Thank you in advance.