In a Function Node, I would like to pass a message built in a catch block of a try one to my error WF (which already contains execution.url, workflow.name, etc …)
… and force an error to be sure that my error WF is fired
You can simply throw a new error in your catch block. That one will then be sent to the error workflow.
Example:
throw new Error('my own error message');
Thanks jan, it didn’t work because I only used throw "my message ....'