Hi -

No such thing as a primitive question, especially if the software crashes ;)

Now, the first thing to try would be to update to a more recent version of CMTK - it seems you have 2.1.0, and that's a bit outdated.

If the current version still crashes, it would be good to know a bit more about your data. What image format are you using? What does your image header look like?

Ideally, if you could send me the two images and transformation file as well as the exact command line you are using, then that would be very helpful to track down the cause of this problem.

Thanks.
  Torsten