Yes, yes. I was logged in as Administrator …

I cannot reproduce this error on my side.

I told you this because the only way to see this log is here:

if (!canManageTraces()) {
            return "You can not manage traces";
        }

Do you have other logs?

If you can, debugging in Nuxeo code should be in one of these methods:

org.nuxeo.ecm.automation.server.jaxrs.doc.DocResource#doGetTrace org.nuxeo.ecm.automation.server.jaxrs.doc.DocResource#toggleTraces

I'll keep you in touch if more information's coming…

I was indeed logged in as administrator, following the guidelines. But, inn fact this error hasn't ever occurred again since, so I think maybe the session had expired when I was testing … This is the only reason I can think of …

Don't hesitate to give some feedbacks if it happens again, would be very interesting.

Glad to hear that (at least for the moment:))

thanks