>>Mark, this is a special case which I've found very useful - the modal form 'defaults' to the private DS of the calling form. You are ALWAYS using a private DS, you just get to choose WHICH DS.
>
>Let me make sure I understand, Barbara. If I set the second form's DS to Default, then it uses the DS of the caller, even though the caller isn't using the Default DS (i.e., DS 1?). Or are you saying I shouldn't populate the second form's DE, and set DataEnvironmentID to the caller's?

Mark,

The former. Modal forms and reports act this way. If a modal form or report is set to the default data session it will use the current data session of the calling form. When you take advantage of this behavior you don't want any de stuff in teh modal form, let the caller handle the data.