Thanks, Roy. I hexedited some acv files and soon found the culprit. It turned out to be an error in Curvemeister grayscale: it was creating acv files with 5 sets of data points, one of which (the 2nd) was used as the single active channel. QTR only accepts acv files with 1 channel indicated and the data in the first set. I think Mike is looking at it now. Shouldn't be too hard to find a solution. Regards, Frank
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Re: ACV Files
2011-12-30 by fjulsing