5. The system of claim 4 , wherein the program instructions for receiving further cause execution of the program instructions for executing controlling execution of the trace file in response to receiving a command that specifies the trace file as a command script.
4. The system of claim 1 , further comprising program instructions for receiving a sequence of user input commands invoking the high-level procedures via a command interface, wherein the program instructions for controlling execution of the executable instruction stream are executed in response to the sequence of user input commands, and wherein the program instructions for generating generate a record of the sequence of user input commands that is subsequently repeated by the program instructions for executing controlling execution of the trace file.