Initial guesses...
First, is the program identifying the plotted point entities in the drawing as Carlson points? If you run EDITPNT and select one of the points does the typical Edit Point dialog open?
editpnt.PNG
Second, when you run the EDITPNT command, note the coordinate file the point is associated with. Is it the same CRD file you have open? Likely is or I think the points would not get selected...
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