When you paste subform in main form, it asks for relationship.
You can have certain no. of fields common in both form. You have to choose them.
even if you are missing them to choose(exstablish relationship), you can do it later also, by going to tab/subfrom's property.
If you have 2 diffeent forms. 1 parent form, another child form, but independent(not pasted like subform) . May be you can use me.refresh. So, relationship key will be refreshed, and you will get latest info for relationship.
I am not sure, what you are asking. but clarify more to correct me.
I am using Access 2002.
I recall the parent child relationship in older versions of Access but 2002 does not have the same properites.
It appears that each subform is linked with the master form as both control sources are the same "table".
If I filer from the master form I get proper records in the subform, but if I filter in the subform I get blank data in the subform but the master form information stays the same.
Would I be using the me.refresh on the filter event ?