Graeme, That's a consequence of your software ;-) 34 sounded like way too much. So much that it could only be explained by something really wrong. Anyhow, you've convinced me to try re-visit chartread one more time. As long as I don't run into the dreaded "Too many patches" error message, it'll be worth taking it to the next level, I guess, and compare with MeasureTool measurement file. I'll be interesting. > Right, but this isn't magic. The 34 delta E is to the (loosely) expected > value (ie. the value I read on one of my charts when I created the .ti2 > file). How did you decide that this wasn't a mis-read that a retry > would correct, or that your chart really is expected to be very similar to > the expected values ? > > Graeme Gill. > > Roger Breton