2.1 Debugging: Introduction to Debugging Active-HDL has very helpful debugging tools. These debugging tools help us easily track down errors and correct those errors accordingly. Debugging tools are used to follow signals throughout design simulation as well as our pre- and post-compilation process. In this video we will look at console window, breakpoints, watch window, process window, call stack window, waveform and list viewer briefly among the vast debugging tools that exist on Active HDL.