The DEBUG command forces a task to trap to a debugging aid by setting the T-bit in the task's Processor Status Word (PSW). To debug a task, it must have been built with the /DA switch or have issued a SPECIFY SST VECTOR TABLE FOR DEBUGGING AID (SVDB$) directive. Nonprivileged users can debug any nonprivileged task that was initiated from their own terminals (TI:). Privileged users can debug any task. The format of the DEBUG command is: DEB[UG] [taskname] where taskname is the name of the task to be debugged. If taskname is not specified, DEBUG looks for the task currently running from the issuing terminal (task TTnn).