I raised this with DAZ a couple of weeks ago, in response to a similar problem on the DAZ forums. The morph packs were updated a little after the release of V3 SAE with 0 byte files for the no-longer-needed expression delta and visibility pz2 files, which are what are causing the error messages for 3DNeo and the mechants: redownloading the Head Morph pack (you can reset from the Itemised order history on your account page) should fix it, if not the wrong version is on the server - let me know and I'll prod DAZ to get it replaced.