DFS3112I USER NOT AVAILABLE, CANNOT PROCESS COMMAND

Explanation
 The specified user name is already allocated and
in session with another node, or is allocated to the specified node,
but with a different half-session qualifier than the one specified
in the ID= keyword for this command.

System action
 The command is ignored.

Operator response
 Use the /DISPLAY ASMT USER command
to determine if the user name is allocated and the node name to which
it is allocated. If the user name is allocated to the same node name
specified in the /OPNDST command, then reenter
the command with the correct half-session qualifier (ID=). If the
user name is allocated to a different node from the one specified
in the /OPNDST command, wait until the user name
becomes available or enter the /STOP USER command
to prevent further allocation when the current allocated session ends.