Loss of ability to ping out

Got an interesting problem, wonder if anyone else has experienced something like this.
Running v2.9.28 it has been up and running for 31 days 17:32:35
recently(not exactly sure when as I was gone for a week) it has lost it’s ability to ping out to anything. In winbox using Tools Ping it does nothing, you get no response that it is actually doing anything. Telnet into it and try and get the response of “failed”. It was pinging out fine before I went on vacation and nothing was touched as far as it’s config or firewall and obviously it was not rebooted. Although I am sure that once I reboot the unit it will start working again but just wondered if anyone has had this happen before or had a solution other than rebooting.
Thanks

Ara

Make a support-output file and send it to support@mikrotik.com. Also upgrade to the latest version.

Has propritry extenstion match on both systems?