Than what i wrote right at the top in my first post is true. You can use the status node. The status node can be used to watch the status text that you see under specific nodes. It will output a message when this text changes with the text in msg.status.text i think. As your node is showing error under the node:
You can use switch node connected to a status node watching this node to only act when this error status appears. This doesn’t give you the whole message but at least it should give you something to work with.
Johannes
