I'm trying to edit a mesh, which was working OK but now the Gizmo is stuck at 0,0. When I try to move an edge for example, the gizmo is now a long way from the edge that I'm trying to move. It seems to be moving OK but when I click the mouse for the final position the whole object moves instead of just the edge so I end up with the exact same object just in a different position.
Also I noticed that if I select No Filter, so that it selects the whole object the Gizmo is in the centre of the object, but if I select edges or vertices the Gizmo is at 0,0.
I opened a new drawing and created a temporary object and it works fine in the new drawing. i.e. the gizmo is centered on the edge that I am moving and only that edge moves.
GTLOCATION is set to 1
I can only assume I must have accidentally changed some other setting or something in the original drawing, but I don't know where to look to fix it.
Thanks for anyone that can help.