DBE_PLDEBUGGER.add_breakpoint
During debugging on the debug end, call add_breakpoint to add a breakpoint. If –1 is returned, the specified breakpoint is invalid. Determine a proper breakpoint position by referring to the canbreak column. If the outer function does not have a breakpoint before entering the inner function, a breakpoint cannot be added to the outer function when the inner function is executed, as described in Table 1.