| Hi Barrymaybe it depends on the surface
 one should know if it is a single or Trimmed  Surface ,
 I think in the second case there may be problems
 you should do some tests ..
 Anyway my and only an impression, but I could check it out
 that the Isocurve command, on which the James macro is based, sometimes gives the
 problems, dependent on the Extraction Surface
 best
 alberto
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