Hi Mark,

>>The only classes that can have a private DS are form and session. <s>

Hmmm. Isn't this a class with a private datasession:

DEFINE CLASS myclass AS Custom

myDS = .NULL.

FUNCTION INIT()
  this.myDS = CREATEOBJECT("Session")
  SET DATASESSION TO this.myDS.DataSession
  USE GETFILE()
END FUNC

ENDDEFINE

Regards,
Viv