I just built this into a test project, compiled to an EXE and ran the EXE under runtime. Works like I would expect it. I placed the following code in the form INIT just to make sure:

SET SAFETY OFF
LOCAL lcProps, lnI
lcProps = []
FOR lnI = 1 TO THIS._Grid1.ColumnCount
   TEXT TO lcProps TEXTMERGE ADDITIVE NOSHOW PRETEXT 2
      Column<<TRANSFORM(lnI)>> Name:   <<THISFORM._Grid1.Columns(lnI).Name>>
          Header Class   :   <<THISFORM._Grid1.Columns(lnI).HeaderClass>>
          Header ClassLib   :   <<THISFORM._Grid1.Columns(lnI).HeaderClassLibrary>>

   ENDTEXT
ENDFOR
STRTOFILE(lcProps, 'GridProps.txt')

The info written to the GridProps.txt file was:

Column1 Name:	Column1
    Header Class	:	_Header
    Header ClassLib	:	d:\Apps\uicora\_gridmembers.prg
Column2 Name:	Column2
    Header Class	:	_Header
    Header ClassLib	:	d:\Apps\uicora\_gridmembers.prg
Column3 Name:	Column3
    Header Class	:	_Header
    Header ClassLib	:	d:\Apps\uicora\_gridmembers.prg
Column4 Name:	Column4
    Header Class	:	_Header
    Header ClassLib	:	d:\Apps\uicora\_gridmembers.prg
Column5 Name:	Column5
    Header Class	:	_Header
    Header ClassLib	:	d:\Apps\uicora\_gridmembers.prg
Column6 Name:	Column6
    Header Class	:	_Header
    Header ClassLib	:	d:\Apps\uicora\_gridmembers.prg
Column7 Name:	Column7
    Header Class	:	_Header
    Header ClassLib	:	d:\Apps\uicora\_gridmembers.prg

>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