Deleting unwanted/no longer used nodes

I’ve got a couple of nodes that have no devices attached (blown switches).
I’ve deleted them from the UI, however they still show up in the Lua Log such as

ZW_Send_Data node 4 NO ROUTE (nil) <0x2b789680>

How can I erase these nodes?

Try following the suggestion here:
[url=http://forum.micasaverde.com/index.php/topic,14146.msg107039.html#msg107039]http://forum.micasaverde.com/index.php/topic,14146.msg107039.html#msg107039[/url]
…I found it using search.