On Sun, 2015-05-24 at 12:07 -0700, Rick Moen wrote: 
Quoting Andrew Greig (pushin.linux@gmail.com):

> I have a SCSI scanner which normally "just works" under Linux.

Make is presumably Epson, but what's the model?  Suggestion:  Whenever
seeking help with Linux support of hardware, it is extremely useful to
provide accurate make/model data.  (If you happen to have chipset
identities, that is also good, but your helpers can determine those
given accurate make/model data.)

It might be that more than one SANE back-end is trying to support your
scanner.  Try temporarily commenting out the lines for 'epson' and
'epkowa' in /etc/sane.d/dll.conf , and trying again.  More tips here:

https://wiki.archlinux.org/index.php/Sane
Hey Rick,
Haven't seen a post from you for ages, I am very glad that this thread brought you out. 
Absolutely correct! Machine is an Epson GT7000S for SCSI.  The aix scsi drivers are loaded as always. Where I struggle with this one is that this is the first time in 9 years that this scanner has not "just worked" after a new install. I have this niggling thought in the back of my mind that it may be a group membership issue.  But what group?  And it doesn’t work as root.

Thanks

Andrew Greig