; TB -- (Traceback) Displays the current call stack. FORMAT TB -Frames n -Args REQUIRED ARGUMENTS None. OPTIONAL ARGUMENTS -Frames Displays the n most recent calls only. -Args Displays routine arguments and shows their contents. DESCRIPTION Use the TB command to follow the chain of calls leading to the current routine. For instance, if you want to know what routine called the routine you are currently in, use the TB command. Note that the TB command has no long form; that is, you cannot invoke it by spelling out TRACEBACK. You can issue the TB command with no options, one option, or two options. With no options, the TB command displays all calls from the most recent to the least recent. If you specify the -Frames option, TB displays the n most recent calls only. Specifying the -Args option is something like specifying a combination TB command and ARGS command. In other words, DEBUG traces the names of the routines and the values of all arguments to those routines. For full details, see Chapter 3 of the DOMAIN Language Level Debugger Reference manual.