Passing parameters from a subform to an action query

[JohnT]

I have a form that passes a field value as a parameter to an action query
that is executed in response to an "AfterUpdate" event. The query execute
properly from within the form. However when the form is included as a subform
within a parent form, when a record is updated in the subform the action
query ask for the parameter value to be input instead of "reading" the value
of the field in the subform like it does when the form is used a stand alone
form.

Any ideas on how to correct this?

 

[ruralguy via AccessMonster.com]

Only the MainForm is in the FORMS collection.
http://www.mvps.org/access/forms/frm0031.htm