{
{   The purpose of this request is to establish the requesting task as the
{ primary task of the job.  The primary task is the task to which such events
{ as interactive conditions are sent.
{
{   If the primary task initiates a child task synchronously, that child task
{ becomes the primary task.  If the primary task terminates, its parent becomes
{ the primary task.
{
{       CLP$SET_PRIMARY_TASK (STATUS)
{
{ STATUS: (output)  This parameter specifies the request status.
{
