IES-VE User Forum

Hi, is anyone else having trouble with 2017 ModelIT and how flaky the Partition Tool has become?

I usually import a DXF plans and trace around the external perimeter walls, then use the Partition tool (new spaces/with partitions) to form the rooms.
This has worked fine for years, on the odd occasion struggling to understand a 'donut' room, like a lift-shaft in a stair-core. However recently (2017) when I partition, more often than not one or more vertical walls, internal and external, just vanish!??
You can't spot this in ModelIT, but in Model Viewer you can spot the missing external walls and not so easily the missing internal walls. It's driving me crazy!!

Am I alone?

Hi Paul,

Mostly I'd see this in the cases where the starting geometry isn't tightly define don the grid. It's a limitation of the partition tool that you should be cutting up well defined shapes and resulting in well defined shapes, grid snaps for your starting and end points are necessary, i'd love to say it's not the case but it is. You say you are tracing on a dxf but if you set a grid to a few decimal places and choose grid snap rather than dxf then do the partitions with grid and end point snaps, I think you'll find it a much more robust tool that gives you a good solid geometry to move on to your analyses.

Phil

Phil
Again and again I see this same advice from support - "draw to the grid". The fact is, it isn't always possible to put every point onto the grid. If a building has diagonal walls (and most have), then there are no points along that diagonal line (apart from either end) that are on the grid. So, if you partition this wall up to create rooms, you will have off-grid vertices on these rooms. And this is the cause of endless adjacency errors in Model-IT, and hence the cause of endless wasted hours trying to overcome them.
Jerry