I don't think you can use aliases in an UPDATE statement so try taking
out the "p3". And check "p12.Attrib_Code". Should that be
"p1.Attrib_Code" instead?
Try this:
Update sde.Property_Backup
set .Attrib_code = p1.Attrib_code
where p2.lis_key = p1.lis_key
and substring(p2.func_key,1,5)='GEOSS'
And P1.aCTIVE =1
end
-- Hope it helps. Grady Christie