How run dynamo so that it will fill in all all "MARK" fields on revit project?

Sorry for the baisic question. it’s actually my first trial with dynamo ever.

The purpose is to fill it with numbering on chronological order. 1,2,3,4…

Each stage is explained in the image below.

Add in a node and run dynamo, follow what is happening node by node.

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actually someone has just sent me a dynamo file that did the trick! i’m attaching here.

That works great! Thanks! :slight_smile: