Using BNA version 12.3, we're seeing an error "Failed to open the Browser." when attempting to open the Element Manager on any device. There is nothing of interest in the logs when this happens. So I went poking around. There is a script in BNA called 'launchbrowser.sh'. It's a nice little script - and I verified that it works perfectly. You can find it here /opt/Network_Advisor12_3_0/db/scripts/launchbrowser.sh. It works great, so I'm confused as to why we're getting this error when the browser needs to be fired up from within BNA.