Kevin,

I was able to reproduce this! Here's a temporary fix for you until the next release:

In the mmBuildr.vcx library, open the mmBldr_spinner class and replace the existing code with the following:

LPARAMETERS vNewVal
*To do: Modify this routine for the Assign method

IF "MM_TEMPGRID.COLUMN" $ UPPER(This.cObjectProperty) AND ;
   EMPTY(MM_TempGrid.Column)
   RETURN
ENDIF

IF NOT EMPTY(This.cObjectProperty)
	STORE EVAL(This.cObjectProperty) TO This.iControlSource
ENDIF
This.Refresh(.t.)

Let me know how this works for you!

Regards,