1.DBG> SET LOG CALC
      DBG> SET OUTPUT LOG

      In this example, the SET LOG command specifies the debugger
      log file to be SYS$DISK:[]CALC.LOG. The SET OUTPUT LOG command
      causes user input and debugger output to be logged to that
      file.

    2.DBG> SET LOG [CODEPROJ]FEB29.TMP
      DBG> SET OUTPUT LOG

      In this example, the SET LOG command specifies the debugger
      log file to be [CODEPROJ]FEB29.TMP. The SET OUTPUT LOG command
      causes user input and debugger output to be logged to that
      file.