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Now there is (since a while actually).

rospack plugins --attrib=plugin nodelet

Ref: http://answers.ros.org/question/65189/nodelet-is-not-recognized-as-a-plugin/

PS: The link @tfoote provided is dead, but wouldn't be surprised, if this is the tool he talked about.

Now there is (since a while actually).

A first check can be done via:

$ rospack plugins --attrib=plugin nodelet
nodelet

Ref: http://answers.ros.org/question/65189/nodelet-is-not-recognized-as-a-plugin/

~~PS:~~ (S: The link @tfoote provided is dead, but wouldn't be surprised, if this is the tool he talked ~~about.~~

about.)

However, this only shows you packages exporting the nodelet information.

If your nodelet is listed there, but you are still unable to load it properly, I suggest to run the following (replace /nodelet_manager with the name of your nodelet manage):

$ rosservice call /nodelet_manager/load_nodelet "name: ''
type: 'burb'
remap_source_args: ['']
remap_target_args: ['']
my_argv: ['']
bond_id: ''"

This will respond with an error.

ERROR: service [/nodelet_manager/load_nodelet] responded with an error:

But in the terminal running the nodelet manager you will get the list of available nodelets. If your nodelet is missing there (or registered under a wrong name), something went wrong with your plugin registration and/or exported nodelet information.