I have a child form that's called by the parent's callchild button. The form worked. I added a VP container to the child form. The new form doesn't work. I get the error:" Cannot open form Timekeeping Standards. An error has occurred. Office must be entered."

Please note that office is in the parent record. The child uses the VP container to hold a FK from the parent's PK. I set the VP to requery automatically. It works well in all of my other similar parent forms that have callchild buttons.

I'd appreciate some insight on what I should look for.