I am using a scatter name oFields and compobj to compare the tables, but I get a .F. if the fields contain .null. while they are identical. Can I resolve this?

As Boris pointed out, you can use NVL() to resolve this.

The reason this happens is that you can think of .NULL. as meaning "I don't know". So if you ask VFP:

Is "I don't know" equal to "I don't know", what would you expect the anser to be?

I would ezpect it to be "I don't know"