On Fri, 15 Feb 2019 07:56:31 +0100 Lutz Haseloff wrote: > First i tried the grph-downsample.lua script. > Unfortunately i get an error message > grph-downsample.lua:31: bad argument #2 to 'format' (number has no > integer representation) See attached log file. I remember that error. The script worked up to a particular context version. I believe a Lua upgrade broke it. The version attached should work. Marco