Error - object is not open

[tbclbd]

I have a form, which has a subform onto which the user is entering a text field. (they do not want to use a memo field because they want to see all that they've entered without scrolling). When the user enters text which will wrap over the length of the text field (60 char for example), I want the program to automatically add a record to the table, and thus, another line to the subform. No matter how I try, I keep getting messages similiar to "Form is not open", "Can not go to current record"

Any suggestions will be greatly appreciated.

thanks