I sympathise, Cockie. I hit an inconsistency last night so started a second gridfill today. After nearly 3 hours, working carefully and with only 11 cells left to fill, I've hit another inconsistency. I can't face starting again. I think it's only happened in the last few letter codings but I can no longer see the wood for the trees. I wonder if I could make the same request as Cockie and ask someone to email me at simond9x at gmail dot com so I can show my code table and the couple of areas in the grid where I may have gone wrong? I never submit my entries. Thanks in advance.