Don't put spaces in it,
Forms!FormName!FieldName

Forms and no space pops up nothing. Forms with 1 space pops up a list of Queries and no forms.
Forms!FormName!FieldName gives me "the expression you entered contains invalid syntax" and highlights the form name.

When you type in Forms! you should then get a popup of your form names if you type in Forms! with a space after it will only give you query and table options after you start typing something else.

Are you typing in literally Forms!FormName!FieldName?
It should be like Forms!CustomerF!CustomerID

Thank you for you help.
When I type Forms! I do not get the popup with the list of forms.
My expression would be Forms!BatteryCurrentF!PartNumber
I then get  "the expression you entered contains invalid syntax" "you may have entered an operand without an operator"
I have had the list not popup before, but I was always able to just type the correct form name and field name and it would work.

A side note, this data base was created in the early 2000's. I did a Save As to my new version. The query I am entering this in is newly created by me.

thank you again.

Todd

Can you confirm that the form is named BatteryCurrentF and it has the field called PartNumber in it?

Can you also go down the Troubleshooter. Mainly the Compact and Repair and the Compile and see if there's anything weird going on

I started a NEW database, just brought in the tables, queries I wanted and start over.
The popups are still not functioning correctly, but I did get it to work.