>I entered the following into the Height property of my grid class:
>
>=EVAL(This.Parent.Height-4)
>
>VFP allowed me to save the class and attempt to run the form. However I got an error saying "Expression Evaluated to an Illegal Value" when attempting to run it.
>
>Now when I try to edit my class I get the same error. Is there a way to remove my invalid syntax, without restoring a backup.
>

Open your class as a table. Scan the table, looking in the Properties memo field, for your error. Correct it either =EVAL('This.Parent.Height-4') or (This.Parent.Height-4) in the field - do not add extra spaces, newlines or whatever, just fix the problem

Close and save.