Philip Reed wrote: > Strip read failed due to misread (Invalid strip patch size was detected, > Re-scan) Hi, was that in response to reading the TID strip ? The TID patches have to be exactly the right length (6mm) or the instrument won't read them. Are they this length on your chart ? As far as I know, the normal patches can't be other than 6.5mm in length either, which is why the -a parameter doesn't do anything fo the DTP20. What length are the patches on the other charts you are comparing it to ? Graeme Gill.