Usage : trace [off|call|call_other|return|args|exec|heart_beat|apply| obj_name|numer] Trace is used as a debugging tool. It will print a debugging message every time the event you specify occurs during the execution of a command that you initiated. To get some idea what is meant by this, try trace call_other and then type stat <yourself>. This will show you all the functions that get called using call_other to get the information for the command. Examples: trace call_other trace return trace off