Composing in sw_watchdog package

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Hello everyone,

currently I am working with the package sw_watchdogs and the provided examples work well. I was trying to use a package I previously build but it did not work. Does anybody have an idea how to correctly use a simple node in this structure? My error message contains the following:

[ERROR] [launch_ros.actions.load_composable_nodes]: Failed to load node 'node_name' of type 'ws::class' in container '/my_namespace/my_container': Could not find requested resource in ament index

I assume this is caused because I did not add/build a library but I am not sure.

Regards s0nc