{
{    The purpose of this request is to compute the number of seconds that have
{ elapsed between the two dates given.  If the "old" date is greater than the
{ "new" date, the number of seconds returned is a negative value.
{
{       PMP$COMPUTE_TIME_DIF_IN_SECONDS (OLD, NEW, SECONDS, STATUS)
{
{ OLD: (input)  This parameter specifies the old date to be used in the
{       computation.
{
{ NEW: (input)  This parameter specifies the new date to be used in the
{       computation.
{
{ SECONDS: (output)  This parameter specifies the number of seconds between the
{       old and new dates.
{
{ STATUS: (output) This parameter specifies the request status.
{       CONDITIONS:
{             pme$invalid_day
{             pme$invalid_hour
{             pme$invalid_millisecond
{             pme$invalid_minute
{             pme$invalid_month
{             pme$invalid_second
{             pme$invalid_year
