exit, if INFO = -23,  DWORK(1) returns the minimum
          value of LDWORK.

  LDWORK  INTEGER
          The length of the array DWORK.
          TYPEG = 'D':               LDWORK &gt;= MAX(1,N);
          (TYPEG = 'C' or TYPEG = 'R')  and  NB &lt;= 0:
                                     LDWORK &gt;= MAX(1,N);
          (TYPEG = 'C' or TYPEG = 'R')  and  NB &gt;= 1:
                                     LDWORK &gt;= MAX(1,( N + K )*NB).

</PRE>
<B>Error Indicator</B>
<PRE>
  INFO    INTEGER
          = 0: