When ERRORTRAP is set to on in the configuration file header, not all of the messages are error messages. Some of the messages only indicate the status of various things in the system. For instance when a named pipe is read there may be no message in the pipe. An LSO INFORMATIONAL message will return indicating the status of the pipe. A workstation configured as a master should not have an input or output list and an informational message indicating that they are missing will be displayed. ERRORTRAP should only be set to ON when installing a new system or making changes to an existing system. When it is on, system performance will be slow.