I want to switch from MMDF to sendmail(ADMN) without disabling   
          MMDF first.  I try to enable sendmail(ADMN) while MMDF is
          still enabled using the custom(ADM) command:

            # custom -p SCO:odtes -e SCO:SendMail
            Executing cqs script ./opt/K/SCO/SendMail/8.6.8g/cntl/cqs

            Enable complete
            #

          The message 'Enable complete' implies that sendmail(ADMN) has been 
          successfully enabled but this is not the case. MMDF is still
          configured and running correctly and no sendmail(ADMN) files
          have been enabled.
 
          I then disable MMDF with "custom -p SCO:odtes -d SCO:MMDF" which is
          successful.  However, when another attempt is made to enable
          sendmail(ADMN) an error is returned and sendmail(ADMN) is still 
          not enabled:

            # custom -p SCO:odtes -e SCO:SendMail
            Executing cqs script ./opt/K/SCO/SendMail/8.6.8g/cntl/cqs

            Enter the full hostname to use for mail [abc.sco.com]:

            *** Initializing configuration files for SCO SendMail (ver 8.6.8g)

            Error:
              Error while executing an enable phase

            Error Stack:
              Attach phase for "SCO:SendMail" failed
              Error attaching component SCO:SendMail::8.6.8g to client SCO_SV
              Error attaching control package for SCO:SendMail
              Client control package has not been successfully loaded


                Enable complete
            #

          MMDF must first be disabled before attempting to enable 
          sendmail(ADMN).  However attempting to enable both MTA's at the 
          same time should not cause these errors.  SCO is aware of 
          this problem and is working to resolve it.

          The SendMail package needs to be reinstalled from either 
          distribution media or from another machine on the network. 
          Once sendmail(ADMN) is reloaded onto the machine it can then be 
          enabled successfully.

          The problem is with the sequence of events.  If MMDF is first
          disabled (before any attempt is made to enable sendmail(ADMN)),
          and then sendmail(ADMN) is enabled, no errors should occur and
          sendmail(ADMN) should be enabled successfully on the first attempt.