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Hi Gabe…
I’m in a hunt now to see if I can find out what 7 and 8 are, although, as I understand it, we’ve found them missing going all the way back to 1.7, so I might have to delve into the really old stuff to get an answer. I think it’s moot though becase…
As for TWEI_ tossing an 8 from a Kodak scanner: welcome to TWRC_INFONOTSUPPORTED. This is one of those things that gives me heartburn. Apparently, the intention was to have something called RetCode in the TW_INFO field (which was added in 1.7). You can still see this field mentioned in the TWAIN Specification. Well, somewhere along the way that field was changed to CondCode inside of TWAIN.H, but TWRC_INFONOTSUPPORTED didn’t change to TWCC_INFONOTSUPPORTED, and the Spec didn’t get fixed.
Augh…
Hope that makes it more clear…
— Mark