Problem with feature line creation

I have a problem creating a feature line. It is creating ghost points for me.
Select_feature_line_v0-.dyn (63.0 KB)


FEATURE LINE_v0.7z (59 Bytes)
What is this due to?

When taking screen shots of the workspace, you can zoom in so that the nodes are readable and use Workspace from Export as Image menu

It also helps if you then expand the warning and take a screen shot of that -or- using Extensions > Graph Node Manager you can copy the warning text

Then it will be easier for the forum members to assist

Thanks I