I found it, The remote platform use not allow a Null value. Just change it allow and all is back to normal.

From: duduhandelman@hotmail.com To: observium@observium.org Subject: Map and Neighbours Date: Mon, 23 Mar 2015 09:47:35 +0200

Hi All, For some reason I don’t have the Neighbours and Map tabs under the ports page. It's probably something that I have change but I'm unable to find it. Also the mysql link table is empty.

Any idea?

Thanks David