Kristian Nielsen wrote: > I tried running your example using the components of McStas version 1.1 > (which version were you using btw? If unsure, "mcstas --version" will > tell you). I am runng version 1.1, but i used the monochromator of version 1.0, which is still shown in the web at http://neutron.risoe.dk/mcstas/components/Monochromator/Monochromator.comp