[Help]Why elements created by Dynamo disappear?

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!

Please take a look at this:

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