To refer to variables on the stack in the current function, specify the name of the variable, for example x.

To refer to a local variable in a nested function, specify the function name followed by a backslash and the name of the local variable (main\i for example). If the nested function is recursive, the last occurrence of that function is used. An explicit reference enables any occurrence to be selected.

To refer to the address where some function on the stack returns, specify the function nesting level preceded by an at sign @. For example, GO @1 executes the program until the debugger reaches the address that corresponds to the location where the current function returns to its caller (the instruction after the call). The LIST and DISASSEMBLE commands can be used to show the code at the return address (LI @2 for example).

In nonrecursive programs, the command GO @1 corresponds to setting a breakpoint when the current function returns to its caller. In recursive programs, the address alone might not be enough to specify the instance that you want. A command such as GO@1; until(depth == 4) can be used to specify the instance of the address that you want (assuming depth is a local variable in your recursive function that determines the instance you are executing).

To explicitly refer to a local variable in a nested function, specify the function nesting level followed by a backslash and the name of the variable. For example, PRINTVALUE @3\str references the local variable str of the function at nesting level 3.

To see all available information about a function, specify the EXPAND command followed by the function nesting level. For example, EXPAND @7 displays all information about the function at the specified level for that particular invocation. This information includes the name of the function, the address that is returned to, and all local variables in the function and their values.