A simple question re Modellines

[dsmith]

Hi

m trying to modify the start and end of a Modelline I created, but I cannot find out how this can be done. I know I can recreate it but I need to maintain the ID as it is uses elswhere

Any pointer would be great

Thank you in Advance

[smarente1]

The endpoint property only has a get method: 

https://www.revitapidocs.com/2022/fa84492f-aaea-004c-2443-d02b6ca83c1d.htm

And the length is read only and cannot be set. 

Looks like you can only recreate the model line and store the old element Id in an associative array.    

[mhannonQ65N2]

Try using the SetGeometryCurve method. Also, a LineSegment is not a model line.