Access 2000 Form gives an error when opening the form

[Guest_imported]

I keep getting the following message on a form:

Microsoft Access can't find the field "I" referred to in your expression.

How do you remedy this problem.
Background on the database:
I inherited this database after it was upgraded. It was an Access 97 Database converted to 2000.

 

[GingerR]

something is missing from the record source of your form.

what is the record source of the form? (look at design view of the form, choose from the menu VIEW-PROPERTIES, copy the record source and paste it here...if it's the name of a query, we need to see the SQL code of the query)