After Importing a submodel, why do I see pipes connecting to the wrong element?
The submodel routine does not support duplicate labels. If there are node elements in the main model and submodel that have the same label, the pipes that reference them as endpoints may connect to the wrong instance. Before importing a submodel, it is recommended that you perform a relabel operation for each element type. To do this, open the flextable, click the options button and click "relabel".
Elements turning inactive and reverting to default properties after submodel import