Open the SCX file that is causing the error as a table.
USE myform.scx

locate the record causing the error.
In your case record #7.
browse the table and open the memo field Properties.
Look for the line ColorSource =
delete this line from the memo field.

Then try to COMPILE myform
I don't know if the last line will work, because your form isn't yet converted.
Otherwise try first to start the conversion again.
Anyhow don't bother to recompile the form.
Fox is only working with the real source code and not the compiled code.
You could only run into problems when you tried to run the form. It could show some unexpected behaviour.