{   This procedure is called to reposition the tape without moving data.  A
{ single tapemark may be skipped either forward or backward.
{
{ NOTE:  Calling this procedure implicitly releases any tape block buffer
{       reservation.
{
{       BAP$TAPE_BM_SKIP_TAPEMARK(FILE_IDENTIFIER, DIRECTION, FAILURE_MODES,
{       STATUS)
{
{   FILE_IDENTIFIER (Input):  The file identifier for the file.
{
{  DIRECTION:  (Input) Direction of skipping.  Either amc$forward or
{        amc$backward.
{
{  FAILURE_MODES:  (Output) Detailed information on any tape I/O error.
{
{  STATUS: (Output) Request status.
