Breakpoint features are standard to NCVIEW.
The breakpoint feature truly exhibits its power when you want to verify machining on a T27 tool in particular.
Just click on the T27 block to set a breakpoint.
Then breakpoint stops NC data from running so that you can use step feed/continuous feed to check cutting.
Stop at the breakpoint so that you can check the value of the variable.
You can also see the values of local variables, common variables, system variables and complex formulas.
You can also see the sub-pro call series from the nested call stack.