!DECK XERCNT
SUBROUTINE XERCNT (LIBRAR, SUBROU, MESSG, NERR, LEVEL, KONTRL)
  IMPLICIT NONE
  !***BEGIN PROLOGUE  XERCNT
  !***SUBSIDIARY
  !***PURPOSE  Allow user control over handling of errors.
  !***LIBRARY   SLATEC (XERROR)
  !***CATEGORY  R3C
  !***TYPE      ALL (XERCNT-A)
  !***KEYWORDS  ERROR, XERROR
  !***AUTHOR  Jones, R. E., (SNLA)
  !***DESCRIPTION
  !
  ! Abstract
  !    Allows user control over handling of individual errors.
  !    Just after each message is recorded, but before it is
  !    processed any further (i.e., before it is printed or
  !    a decision to abort is made), a call is made to XERCNT.
  !    If the user has provided his own version of XERCNT, he
  !    can then override the value of KONTROL used in processing
  !    this message by redefining its value.
  !    KONTRL may be set to any value from -2 to 2.
  !    The meanings for KONTRL are the same as in XSETF, except
  !    that the value of KONTRL changes only for this message.
  !    If KONTRL is set to a value outside the range from -2 to 2,
  !    it will be moved back into that range.
  !
  ! Description of Parameters
  !
  !  --Input--
  !    LIBRAR - the library that the routine is in.
  !    SUBROU - the subroutine that XERMSG is being called from
  !    MESSG  - the first 20 characters of the error message.
  !    NERR   - same as in the call to XERMSG.
  !    LEVEL  - same as in the call to XERMSG.
  !    KONTRL - the current value of the control flag as set
  !             by a call to XSETF.
  !
  !  --Output--
  !    KONTRL - the new value of KONTRL.  If KONTRL is not
  !             defined, it will remain at its original value.
  !             This changed value of control affects only
  !             the current occurrence of the current message.
  !
  !***REFERENCES  R. E. Jones and D. K. Kahaner, XERROR, the SLATEC
  !             Error-handling Package, SAND82-0800, Sandia
  !             Laboratories, 1982.
  !***ROUTINES CALLED  (NONE)
  !***REVISION HISTORY  (YYMMDD)
  !   790801  DATE WRITTEN
  !   861211  REVISION DATE from Version 3.2
  !   891214  Prologue converted to Version 4.0 format.  (BAB)
  !   900206  Routine changed from user-callable to subsidiary.  (WRB)
  !   900510  Changed calling sequence to include LIBRARY and SUBROUTINE
  !       names, changed routine name from XERCTL to XERCNT.  (RWC)
  !   920501  Reformatted the REFERENCES section.  (WRB)
  !***END PROLOGUE  XERCNT
  CHARACTER(len=*) :: LIBRAR, SUBROU, MESSG
  INTEGER :: NERR, LEVEL, KONTRL
  !***FIRST EXECUTABLE STATEMENT  XERCNT
  RETURN
END SUBROUTINE XERCNT