Attempt to modify the model outside of transaction.while duplicating WallType

[arvind.maurya37]

While Creating Duplicate WallType using revit Api

 using (Transaction tr = new Transaction(dbDoc))
                {
                  WallType retValue = refType.Duplicate("WType1") as WallType;
                    tr.Commit();
                }

 

at

refType.Duplicate("WType1") as WallType 

Attempt to modify the model outside of transaction.  as  an exception

and my from is opened as ShowDialog();

[naveen.kumar.t · Accepted solution]

Hi @arvind.maurya37,

First start the transaction

using (Transaction tr = new Transaction(dbDoc))
                {
                     tr.Start("Your transaction name");
                  WallType retValue = refType.Duplicate("WType1") as WallType;
                    tr.Commit();
                }

[dhilip_seshan]

Can you please post the same code for python, facing same issue in dynamo Python after adding transaction command