CorrectReference won't convert the jpg bump files to bum. What I do is find the folder in question. Then I load a prop (I usually use the ball from Poser Prop Types), and apply a bump map to the prop. Poser offers to convert the jpg file to bum. Do this till all the jpg bump maps are converted. Then run CorrectReference and ensure that all texture references are correct. Then load the actual product, and everything works fine.