the forum was upgraded (or migrated to a new platform?) ages ago & old post were transferred across
I thought the old links still worked but maybe not.
If you search you will find the post, with a different URL
Huge tree table in Excel, how can I get this into Revit - Packages - Dynamo (dynamobim.com)
Refer to the second to last post from me- someone else had the same problem with attachments dropping off