Note the following when you change the environment or the configuration of OpenTP1:

• Changing the system definition
  Some changes in the system definition are reflected when OpenTP1 is restarted and others are reflected when OpenTP1 starts normally. Therefore, stop OpenTP1 when necessary.
  
• Upgrading product versions
  Stop OpenTP1 normally and then upgrade the version.
  
• Adding application programs
  You can add application programs during online operation.
  
• Switching application programs
  Stop the application program you want to replace and then exchange it with the new one.
  
• Replacing part of an MCF communication service
  You can replace MCF communication service files during online processing when TP1/NET/TCP/IP, TP1/NET/Secondary Logical Unit - TypeP2, or TP1/NET/OSAS-NIF is used.
  For details about partial replacement of MCF communication services, see 3.13.3 Replacing part of an MCF communication service.