I must admit this is a difficult situation and CRM is a tool, not always the solution. Some guys just don't 'click' and it's hard to change that around. A few locals just don't like expats taking their jobs. I sometimes fly with a 48 yr F/O, older than me, who keeps on saying how long he's been in the business. We don't get along and that is a shame because I like a good team and a laugh. I think though that reporting without notice is not done, have the courage to try and settle the problem first and then go to the fleet office if there is no solution.