How do i prevent the deleting of dimensions which are already created using dynamo

[jacob.small]

Are they deleting on subsequent runs? If so this is an element binding issue. You can learn more about this topic here:

Element Binding in Revit

Element binding is the name given to the process which Dynamo manage to ‘track’ the items created in non-Dynamo files. In this case, I’m going to focus entirely on element binding as it refers to Dynamo for Revit, but the mechanism exists to allow for this behavior in other applications (advanced steel, fusion, alias, etc.) as well. In the context of Revit, ‘elements’ refers to anything with an Element ID in the Revit database. When utilized correctly, element binding will expand how you leverag…

If they are deleting through some other method we would need to know more about when and how it is occurring.