{
{  The purpose of this request is to close a segment access file in use by device management.
{ The segment associated with the file (pva) is removed from the address space of the caller.
{ The backing store for the file is left intact.
{
{  dmp$close_file (pva, status)
{
{  pva: (input) This parameter specifies the pva associated with the file to be closed.
{
{  status: (output) This parameter returns the result of the request.
{
