Capture Fetch Collection Error Result

[peteletkemansst]

I have a collection which is filled by a third party REST API call.
Most of the time this call works fine, however some times the third party server is down for a few minutes.
How can I capture the error when the server is down?
Note, this REST call happens when a page/control is loaded and not necessarily when a form is submitted (although it could happen here as well).

[kevinwasie]

Redirect based on collection error

If a collection that is used in the page returns an error code, ie Unauthorized, I’d like to redirect to a standard error page. How can I do this?

Workflow Errors

Do we have access to throw errors in a workflow? For example, I want to create a custom javascript in an Action inside of a workflow. If that custom javascript fails, I’d like to throw an error and set the error message and error name to a custom value.