I think the point cloud bit is a red herring. The problematical elements are the text nodes. At first I couldn't see them either (on SS4) So I used Select By to isolate all the text nodes in the file. There were 27, 2 of which were populated and 25 were empty. The two nodes with data were visible in the small bit of data below the blank-out, and the node markers turned off and on correctly using the View Attributes box. I the turned everything off except the levels with text nodes. Fit All only showed the small area with the two nodes. Then I put some text in one of the empty nodes on level FULLMAPPING * Check, and all of the text node markers sprang into life, visible at the top left of drawing area, as described, and toggle correctly. The remaining node, on the Bridges level had to be activated separately. All extremely puzzling, and I can find no mention of settings for empty nodes being different to those of full ones!
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