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.

SRNAME

          SRNAME is CHARACTER*(*)


          The name of the routine which called XERBLA.

INFO

          INFO is INTEGER


          The position of the invalid parameter in the parameter list


          of the calling routine.

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