', the leading K-by-N*L part of
          this array must contain the first block row of T.

  LDTR    INTEGER
          The leading dimension of the array TR.  LDTR &gt;= MAX(1,K).

  B       (input)  DOUBLE PRECISION array, dimension (LDB,R)
          On entry with TRANS = 'N', the leading N*L-by-R part of
          this array must contain the matrix B.
          On entry with TRANS = 'T' or TRANS = 'C', the leading
          M*K-by-R part of this array must contain the matrix B.

  LDB     INTEGER
      