{    The purpose of this request is to send a message to the specified
{ mainframe.
{
{       JMP$SEND_JOB_MESSAGE (TARGET_MAINFRAME_ID, JOB_MESSAGE, STATUS);
{
{ TARGET_MAINFRAME_ID: (input)  This is the mainframe to which the message is
{       to be delivered.  If the identifier pmc$null_mainframe_id is specified,
{       the message will be delivered to all mainframes in the cluster.
{
{ JOB_MESSAGE: (input)  This is the message to be sent.
{
{ STATUS: (output) This is the status of the request.
{      CONDITIONS:
{            jme$job_message_error
