Hello -
I am getting this error when generating PDF file ?
Is that using the price list add-on?
Is that the full path the error message displays:
/images/thumbnails/0/320/320/iphone
No file extension on the end?
Search your database for instances of “/images/thumbnails/0/320/320/iphone” - you should find more than one instance, otherwise there's redundant data killing it somewhere.