Hello,
Does anyone know how the position of Revit geometry (generic model or entourage) might be set by coordinates from Dyanmo? We are looking to have an element track position along a line using a number slider that drives the location of a point.
Thanks
Are you trying to move existing element to new position or place new element?
Hi Kulkul,
The former. We want to control the location of a component through Dynamo to demonstrate design possibilities, it ought therefore to be iterative. If we imagine the point in the GIF below as the X/Y location for the gen.mod./ entourage, we want to have a component hosted to that point so t hat it will move in the Revit model environment
.The Family.InstanceByPoint node should do the trick. To translate a Dynamo XYZ point into Revit XYZ coordinates you would have to convert the coordinate system, the simple way being to use the 
_Convert Dynamo XYZ to Revit Coordinate XYZ node from the Sastrugi package. 
Hi @Ewan_Opie
Thank you. That was very useful. The Instancebypoint node is exactly what I needed, however the re-scale tool does not work. Do you know what is wrong?
thanks
Hi Vikram,
Just curious- a bit new to Dynamo… will it not work if I connect the point from Curve.PointAtParameter directly to the FamilyInstance.ByPoint node like the image below:?
Sorry, I would have normally tried this on my pc to see if it will work but I don’t have it right now… 
and I’m afraid I will forget to try it when I finally get my pc back…
@archjahzzy you are correct, feeding the Curve.PointAtParameter node to the FamilyInstance.ByPoint node does work. 
@PlymouthRick I cannot replicate the error you are getting with Null values, what version of Dynamo are you using? Transforming the point locations should only be necessary if your project has a rotated/relocated Project Base Point.
It will.
For clarity (in the example) I isolated the family creation nodes from the nodes that move the family instance.
