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xerbla

 NAME
      XERBLA - i an error handler for the LAPACK routines

 SYNOPSIS
      SUBROUTINE XERBLA( SRNAME, INFO )

          CHARACTER*6    SRNAME

          INTEGER        INFO

 PURPOSE
      XERBLA  is an error handler for the LAPACK routines.  It is
      called by an LAPACK routine if an input parameter has an
      invalid value.  A message is printed and execution stops.

      Installers may consider modifying the STOP statement in
      order to call system-specific exception-handling facilities.

 ARGUMENTS
      SRNAME  (input) CHARACTER*6
              The name of the routine which called XERBLA.

      INFO    (input) INTEGER
              The position of the invalid parameter in the parame-
              ter list of the calling routine.

              End of XERBLA