Bob,
Quote:I go into the child app, and export all data to file.
I create a copy of the child app, and then delete all data.
I try to import into the subform,
These above steps are unnecessary as far as I am understanding what you are doing.
When you had the student enter in the codes, are they on both the form you plan to use as a parent and the form you plan to use as a child? If they are only on one of the two forms do not follow the below steps.
Open your DB, that has both databases in it, in designer.
Redesign the Parent Form
Add a Subform element to the form
Select the form you want to display as the subform
Choose Relational linking
In Step 4 choose the correct field for both the parent and the child. Note these are the field names from the underlying database. Do not confuse these with the element names. They may be the same, they may not, double check.
Click Okay
Save
Preview
Open Search Update
Hit F10
The first parent record will display
***Does it show any child records?
If it does not show any child records, copy the value that is in the Code element and open the child form standalone in Search Update.
Paste the value that you copied from the parent form into the code element on the child form.
Hit F10
***Are any records retrieved?
-Ray