[Help]Why elements created by Dynamo disappear?

[Dornan_Luke]

Hi All:
In Dynamo version 1.1, occasionally the elements created
by Dynamo script disappear after the file is closed and reopened.

The scenario is:

1. Elements are created by Dynamo script. Everything looks fine.
2. The file is saved and closed.
3. When the file is reopened, those newly created elements disappear.

Will clicking “Transaction.End” and “Transaction.Start” in the node resolve this problem?

I beg yous expert assistance.
Thank you!

[Yna_Db]

Please take a look at this:

Update Delete

This is a tough nut to crack. All newly created elements in Revit are linked to the appropriate creation node inside Dynamo. The logic is that if you delete the node, or change the input, it automatically deletes the elements inside Revit so that you don’t get duplicated elements one on top of each other. I don’t know of a solution, unfortunately but a temporary work-around would be the following: 1)Run your dynamo definition and create the elements. 2)Unhook the create walls node. That will …