Access 2000 Subform not opening

D

Developer Pup

Recently, I am having problems opening an access form / subform combination.
The main form is tied to the subform by a control named
"personalInformationID" in both forms. This form has worked fine in the past.
However, when I currently try to open it the subform does not appear. All
appears fine in design mode. When I open the form in a previously saved data
base, all appears. But, when I try to copy the form from a previously saved
database to my current database to solve this issue, the subform does not
appear. When I change to other controls in the child link fields, all works
fine. All names are spelled correctly? What could be the cause
 
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