> VueScan uses a predictor of 2 - 7 isn't a valid predictor. All 2 means is
> to take the difference between adjacent pixel values before compressing.
I don't understand. If a predictor of 2 is invalid why would you use it?
The error I get from PSP is "A predictor of 2 is only supported
for LZW compression on 8 and 24 bit images". Obviously it's a 48bit
LZW TIFF from Vuescan which causes this error. An uncompressed
TIFF opens fine.