When you run your script the following menu window should be appeared: MATLAB R2015a APPS AM New Variable Analyze Code Preferences ? Please choose one Run and Time Set Path Layout Help Import Data cube > Open Variable Save Workspace Clear Workspace VARIABLE 03 Community Request Support Add-Ons RESOURCES Simulink Library SIMULINK Clear Commands Parallel CODE ENVIRONMENT rectangular box klab Scripts Command Window sphere right circular cylinder >> VolumeMenu fx right circular cone right square pyramid reachability_graph.m rslt.dat