Link Parameter for Element placement

Hi all…Can anyone tell me which inputs i need to link for Parameter value?

@hardik.gohel8 It is the location of AC on your curve, the value should be within the range of 0 to 1, 0 is the start of your curve and 1 is the end, let’s say you want to create 5 AC on that curve, then you can give the parameter value as 0…1…#5.

One more thing, in your graph you have attached the output of Select Model Element directly to curve input, you have to use Element.Geometry after Select Model Element so that the curve from Revit can get converted into the curve in Dynamo.

Hope that will help you go further.
Let me know if that doesn’t work for you.