Preparing the workspace
Before you develop a new robot control application you should make sure that all NXT handles, global variables and settings are resetted and the old figures are closed. To make sure you are working with a clean workspace use:
COM_CloseNXT('all') close all clear all
at the beginning of your main robot application. The important thing here is that clear all comes after COM_CloseNXT, otherwise it won't work.
If you also want a clean command window (which helps cleaning previous error messages when tracking bugs), you can optionally use
clc % clear old messages from command line
This leavey your command history fully untouched by the way. Now you should have a clean environment for your program.
Proceed to next chapter.