Eduardo: (...) Any way you like. You could for example use a sequence of independent DAT files. Or you could do something like: 0 CLEAR 1 0 0 0 0 1 0 0 0 1 0 0 0 1 model.dat 0 STEP 0 CLEAR 1 0 1 0 0 1 0 0 0 1 0 0 0 1 model.dat 0 STEP 0 CLEAR 1 0 3 0 (...) (23 years ago, 10-Aug-01, to lugnet.cad)