Hi, Like Miha Staut, I've had a singular matrix-problem. The way to solve this according to the manual (section C.1.2) is to add 'average=1' to the data-command. It should actually be 'average', so without the '=1'-part. Likewise 'noaverage' has to be used instead of 'average=0'. See also section 4.2.1 (general options).
Henk Sierdsema
