I’m not sure how to allow the Revit model to be editable by Dynamo. When I run a ‘user interface’ the node doesn’t have the data from Revit, only nulls are shown.
Hi Abu, welcome 
Are you able to post a screenshot of what you are experiencing?
See here How to export a graph image [Correctly] for some tips
Are you referring to Data-Shapes by any chance?
‘Data-shape is one of the packages. But even without packages, I don’t see my model in Dynamo.
That node likely uses an unsupported Python engine so you’ll need to rework it or find an alternative. Which package is it from? Do you see any notifications when you open the graph (and have you tried following those instructions if so)?
That is a Genius Loci node - you will have to install DynamoIronPython2.7.Please note that there are different versions of the package depending on your Revit Dynamo version
Thanks this was very helpful. Do I need to add this package for every script?