diff --git a/interface/trtri.c b/interface/trtri.c
index 007dbd7fa..5aa5e9b9b 100644
--- a/interface/trtri.c
+++ b/interface/trtri.c
@@ -60,7 +60,6 @@ static blasint (*trtri_parallel[])(blas_arg_t *, BLASLONG *, BLASLONG *, FLOAT *
 };
 #endif
 
-extern void BLASFUNC(dtrtrilapack)(char *UPLO, char *DIAG, int *N, double *a, int *ldA, int *Info);
 
 int NAME(char *UPLO, char *DIAG, blasint *N, FLOAT *a, blasint *ldA, blasint *Info){
 
@@ -133,18 +132,6 @@ int NAME(char *UPLO, char *DIAG, blasint *N, FLOAT *a, blasint *ldA, blasint *In
   if (args.nthreads == 1) {
 #endif
 
-#if DOUBLE
-    // double trtri_U single thread error
-    // call dtrtri from lapack for a walk around.
-    if(uplo==0){
-      BLASFUNC(dtrtrilapack)(UPLO, DIAG, N, a, ldA, Info);
-#ifndef PPC440
-      blas_memory_free(buffer);
-#endif
-      return 0;
-    }
-#endif
-
     *Info = (trtri_single[(uplo << 1) | diag])(&args, NULL, NULL, sa, sb, 0);
     
 #ifdef SMP
diff --git a/lapack/trtri/Makefile b/lapack/trtri/Makefile
index 10d3cb7fd..626c47bbf 100644
--- a/lapack/trtri/Makefile
+++ b/lapack/trtri/Makefile
@@ -13,7 +13,6 @@ ZBLASOBJS = ztrtri_UU_single.$(SUFFIX) ztrtri_UN_single.$(SUFFIX) ztrtri_LU_sing
 
 XBLASOBJS = xtrtri_UU_single.$(SUFFIX) xtrtri_UN_single.$(SUFFIX) xtrtri_LU_single.$(SUFFIX) xtrtri_LN_single.$(SUFFIX)
 
-DBLASOBJS += dtrtri_lapack.$(SUFFIX)
 
 ifdef SMP
 SBLASOBJS += strtri_UU_parallel.$(SUFFIX) strtri_UN_parallel.$(SUFFIX) strtri_LU_parallel.$(SUFFIX) strtri_LN_parallel.$(SUFFIX)
@@ -54,9 +53,6 @@ dtrtri_UU_single.$(SUFFIX) : trtri_U_single.c
 dtrtri_UN_single.$(SUFFIX) : trtri_U_single.c
 	$(CC) -c $(CFLAGS) -UCOMPLEX -DDOUBLE -UUNIT $< -o $(@F)
 
-dtrtri_lapack.$(SUFFIX) : dtrtri_lapack.f
-	$(FC) -c $(FFLAGS) -UCOMPLEX -DDOUBLE -DUNIT $< -o $(@F)
-
 dtrtri_LU_single.$(SUFFIX) : trtri_L_single.c
 	$(CC) -c $(CFLAGS) -UCOMPLEX -DDOUBLE -DUNIT $< -o $(@F)
 
diff --git a/lapack/trtri/dtrtri_lapack.f b/lapack/trtri/dtrtri_lapack.f
deleted file mode 100644
index 8e9a08170..000000000
--- a/lapack/trtri/dtrtri_lapack.f
+++ /dev/null
@@ -1,242 +0,0 @@
-*> \brief \b DTRTRI
-*
-*  =========== DOCUMENTATION ===========
-*
-* Online html documentation available at 
-*            http://www.netlib.org/lapack/explore-html/ 
-*
-*> \htmlonly
-*> Download DTRTRI + dependencies 
-*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dtrtri.f"> 
-*> [TGZ]</a> 
-*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dtrtri.f"> 
-*> [ZIP]</a> 
-*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dtrtri.f"> 
-*> [TXT]</a>
-*> \endhtmlonly 
-*
-*  Definition:
-*  ===========
-*
-*       SUBROUTINE DTRTRI( UPLO, DIAG, N, A, LDA, INFO )
-* 
-*       .. Scalar Arguments ..
-*       CHARACTER          DIAG, UPLO
-*       INTEGER            INFO, LDA, N
-*       ..
-*       .. Array Arguments ..
-*       DOUBLE PRECISION   A( LDA, * )
-*       ..
-*  
-*
-*> \par Purpose:
-*  =============
-*>
-*> \verbatim
-*>
-*> DTRTRI computes the inverse of a real upper or lower triangular
-*> matrix A.
-*>
-*> This is the Level 3 BLAS version of the algorithm.
-*> \endverbatim
-*
-*  Arguments:
-*  ==========
-*
-*> \param[in] UPLO
-*> \verbatim
-*>          UPLO is CHARACTER*1
-*>          = 'U':  A is upper triangular;
-*>          = 'L':  A is lower triangular.
-*> \endverbatim
-*>
-*> \param[in] DIAG
-*> \verbatim
-*>          DIAG is CHARACTER*1
-*>          = 'N':  A is non-unit triangular;
-*>          = 'U':  A is unit triangular.
-*> \endverbatim
-*>
-*> \param[in] N
-*> \verbatim
-*>          N is INTEGER
-*>          The order of the matrix A.  N >= 0.
-*> \endverbatim
-*>
-*> \param[in,out] A
-*> \verbatim
-*>          A is DOUBLE PRECISION array, dimension (LDA,N)
-*>          On entry, the triangular matrix A.  If UPLO = 'U', the
-*>          leading N-by-N upper triangular part of the array A contains
-*>          the upper triangular matrix, and the strictly lower
-*>          triangular part of A is not referenced.  If UPLO = 'L', the
-*>          leading N-by-N lower triangular part of the array A contains
-*>          the lower triangular matrix, and the strictly upper
-*>          triangular part of A is not referenced.  If DIAG = 'U', the
-*>          diagonal elements of A are also not referenced and are
-*>          assumed to be 1.
-*>          On exit, the (triangular) inverse of the original matrix, in
-*>          the same storage format.
-*> \endverbatim
-*>
-*> \param[in] LDA
-*> \verbatim
-*>          LDA is INTEGER
-*>          The leading dimension of the array A.  LDA >= max(1,N).
-*> \endverbatim
-*>
-*> \param[out] INFO
-*> \verbatim
-*>          INFO is INTEGER
-*>          = 0: successful exit
-*>          < 0: if INFO = -i, the i-th argument had an illegal value
-*>          > 0: if INFO = i, A(i,i) is exactly zero.  The triangular
-*>               matrix is singular and its inverse can not be computed.
-*> \endverbatim
-*
-*  Authors:
-*  ========
-*
-*> \author Univ. of Tennessee 
-*> \author Univ. of California Berkeley 
-*> \author Univ. of Colorado Denver 
-*> \author NAG Ltd. 
-*
-*> \date November 2011
-*
-*> \ingroup doubleOTHERcomputational
-*
-*  =====================================================================
-      SUBROUTINE DTRTRILAPACK( UPLO, DIAG, N, A, LDA, INFO )
-*
-*  -- LAPACK computational routine (version 3.4.0) --
-*  -- LAPACK is a software package provided by Univ. of Tennessee,    --
-*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
-*     November 2011
-*
-*     .. Scalar Arguments ..
-      CHARACTER          DIAG, UPLO
-      INTEGER            INFO, LDA, N
-*     ..
-*     .. Array Arguments ..
-      DOUBLE PRECISION   A( LDA, * )
-*     ..
-*
-*  =====================================================================
-*
-*     .. Parameters ..
-      DOUBLE PRECISION   ONE, ZERO
-      PARAMETER          ( ONE = 1.0D+0, ZERO = 0.0D+0 )
-*     ..
-*     .. Local Scalars ..
-      LOGICAL            NOUNIT, UPPER
-      INTEGER            J, JB, NB, NN
-*     ..
-*     .. External Functions ..
-      LOGICAL            LSAME
-      INTEGER            ILAENV
-      EXTERNAL           LSAME, ILAENV
-*     ..
-*     .. External Subroutines ..
-      EXTERNAL           DTRMM, DTRSM, DTRTI2, XERBLA
-*     ..
-*     .. Intrinsic Functions ..
-      INTRINSIC          MAX, MIN
-*     ..
-*     .. Executable Statements ..
-*
-*     Test the input parameters.
-*
-      INFO = 0
-      UPPER = LSAME( UPLO, 'U' )
-      NOUNIT = LSAME( DIAG, 'N' )
-      IF( .NOT.UPPER .AND. .NOT.LSAME( UPLO, 'L' ) ) THEN
-         INFO = -1
-      ELSE IF( .NOT.NOUNIT .AND. .NOT.LSAME( DIAG, 'U' ) ) THEN
-         INFO = -2
-      ELSE IF( N.LT.0 ) THEN
-         INFO = -3
-      ELSE IF( LDA.LT.MAX( 1, N ) ) THEN
-         INFO = -5
-      END IF
-      IF( INFO.NE.0 ) THEN
-         CALL XERBLA( 'DTRTRI', -INFO )
-         RETURN
-      END IF
-*
-*     Quick return if possible
-*
-      IF( N.EQ.0 )
-     $   RETURN
-*
-*     Check for singularity if non-unit.
-*
-      IF( NOUNIT ) THEN
-         DO 10 INFO = 1, N
-            IF( A( INFO, INFO ).EQ.ZERO )
-     $         RETURN
-   10    CONTINUE
-         INFO = 0
-      END IF
-*
-*     Determine the block size for this environment.
-*
-      NB = ILAENV( 1, 'DTRTRI', UPLO // DIAG, N, -1, -1, -1 )
-      IF( NB.LE.1 .OR. NB.GE.N ) THEN
-*
-*        Use unblocked code
-*
-         CALL DTRTI2( UPLO, DIAG, N, A, LDA, INFO )
-      ELSE
-*
-*        Use blocked code
-*
-         IF( UPPER ) THEN
-*
-*           Compute inverse of upper triangular matrix
-*
-            DO 20 J = 1, N, NB
-               JB = MIN( NB, N-J+1 )
-*
-*              Compute rows 1:j-1 of current block column
-*
-               CALL DTRMM( 'Left', 'Upper', 'No transpose', DIAG, J-1,
-     $                     JB, ONE, A, LDA, A( 1, J ), LDA )
-               CALL DTRSM( 'Right', 'Upper', 'No transpose', DIAG, J-1,
-     $                     JB, -ONE, A( J, J ), LDA, A( 1, J ), LDA )
-*
-*              Compute inverse of current diagonal block
-*
-               CALL DTRTI2( 'Upper', DIAG, JB, A( J, J ), LDA, INFO )
-   20       CONTINUE
-         ELSE
-*
-*           Compute inverse of lower triangular matrix
-*
-            NN = ( ( N-1 ) / NB )*NB + 1
-            DO 30 J = NN, 1, -NB
-               JB = MIN( NB, N-J+1 )
-               IF( J+JB.LE.N ) THEN
-*
-*                 Compute rows j+jb:n of current block column
-*
-                  CALL DTRMM( 'Left', 'Lower', 'No transpose', DIAG,
-     $                        N-J-JB+1, JB, ONE, A( J+JB, J+JB ), LDA,
-     $                        A( J+JB, J ), LDA )
-                  CALL DTRSM( 'Right', 'Lower', 'No transpose', DIAG,
-     $                        N-J-JB+1, JB, -ONE, A( J, J ), LDA,
-     $                        A( J+JB, J ), LDA )
-               END IF
-*
-*              Compute inverse of current diagonal block
-*
-               CALL DTRTI2( 'Lower', DIAG, JB, A( J, J ), LDA, INFO )
-   30       CONTINUE
-         END IF
-      END IF
-*
-      RETURN
-*
-*     End of DTRTRI
-*
-      END
diff --git a/lapack/trtri/trtri_U_single.c b/lapack/trtri/trtri_U_single.c
index 72133d896..c79281cfb 100644
--- a/lapack/trtri/trtri_U_single.c
+++ b/lapack/trtri/trtri_U_single.c
@@ -127,8 +127,14 @@ blasint CNAME(blas_arg_t *args, BLASLONG *range_m, BLASLONG *range_n, FLOAT *sa,
 	    if (min_i > GEMM_P) min_i = GEMM_P;
 	    
 	  if (ls == i + bk) {
-	    NEG_TCOPY (bk, min_i, a + (is + i * lda) * COMPSIZE, lda, sa);
-	    
+	    //NEG_TCOPY (bk, min_i, a + (is + i * lda) * COMPSIZE, lda, sa);
+
+	    GEMM_BETA(min_i, bk, 0, dm1, 
+#ifdef COMPLEX
+		      ZERO, 
+#endif
+		      NULL, 0, NULL, 0, a + (is + i * lda) * COMPSIZE, lda);
+
 	    TRSM_KERNEL_RN(min_i, bk, bk, dm1, 
 #ifdef COMPLEX
 			   ZERO,
@@ -171,8 +177,13 @@ blasint CNAME(blas_arg_t *args, BLASLONG *range_m, BLASLONG *range_n, FLOAT *sa,
 	  min_i = i - is;
 	  if (min_i > GEMM_P) min_i = GEMM_P;
 	  
-	  NEG_TCOPY (bk, min_i, a + (is + i * lda) * COMPSIZE, lda, sa);
-	  
+	  //NEG_TCOPY (bk, min_i, a + (is + i * lda) * COMPSIZE, lda, sa);
+	  GEMM_BETA(min_i, bk, 0, dm1, 
+#ifdef COMPLEX
+		    ZERO, 
+#endif
+		    NULL, 0, NULL, 0, a + (is + i * lda) * COMPSIZE, lda);
+
 	  TRSM_KERNEL_RN(min_i, bk, bk, dm1, 
 #ifdef COMPLEX
 			 ZERO,