Imported data in subforms not showing up in application View

Imported data in subforms not showing up in application View

I'm importing data into an application that has 4 subforms.  The information is going directly into the separate subforms, but then it won't display in the actual application view.  I've tried modifying the column properties in the application view, the subforms show that they are linked, but when I try to choose the field to display, I get a little yellow triangle error on the bottom, left of the page when I click done and no changes are made.  Any ideas?