Hi Mark,
there are problems with

>	Name = [Column]

the first you will see if you check your colums CLASS property - it shows 'Column' instead of '_Column'

the second is out of the help file, page Member Class:
Caution Do not change the Name property for a member class in a program (.prg) -based class definition at design time. Doing so can result in generating the message, "Class definition name is not found."

There seems to be some logic in it - you have no class named 'Column' in your prg.

See also thread#786711

Agnes