Hello everyone! In Simulink , I use the Embedded MATLAB Function function out = fcn(meas) if meas>10 out = 4; elseif meas<=0 out=2; end And I get this message: Output argument 'out' is not assigned on some execution paths. I would like the variable 'out' to change its value only if either of these conditions is true. So I guess I have to give 'out' an initial value that is valid only for the first cycle of the program. Does anyone know how I can do that? Thanks!