DFHCE3587 You cannot signon at this terminal at this time.

Explanation
      You cannot signon at this terminal at this time. The SNSCOPE initialization parameter disallows signon to more than one terminal at a time. An internal failure during SNSCOPE checking means that CICS is unable to confirm if the user is already signed on elsewhere. The failure has occurred because the limit of concurrent MVS ENQ requests has been reached.

    
System action
      The signon transaction terminates. Message DFHUS0120 will have been written to the console. See the explanation of this message for further information.

    
User response
      Please report this problem to your CICS systems programmer.

    
Module
DFHSNP
Destination      
      Terminal End User