diff --git a/src/ccsd/ccsd_t_space_orb_abc.irp.f b/src/ccsd/ccsd_t_space_orb_abc.irp.f
index 462d4adf..7c0ed929 100644
--- a/src/ccsd/ccsd_t_space_orb_abc.irp.f
+++ b/src/ccsd/ccsd_t_space_orb_abc.irp.f
@@ -36,10 +36,10 @@ subroutine ccsd_par_t_space_v3(nO,nV,t1,t2,f_o,f_v,v_vvvo,v_vvoo,v_vooo,energy)
   !v_vvvo(b,a,d,i) * t2(k,j,c,d) &
   !X_vovv(d,i,b,a,i) * T_voov(d,j,c,k)
 
-  !$OMP DO collapse(3)
-  do i = 1, nO
-    do a = 1, nV
-      do b = 1, nV
+  !$OMP DO 
+  do a = 1, nV
+    do b = 1, nV
+      do i = 1, nO
         do d = 1, nV
           X_vovv(d,i,b,a) = v_vvvo(b,a,d,i)
         enddo
@@ -48,10 +48,10 @@ subroutine ccsd_par_t_space_v3(nO,nV,t1,t2,f_o,f_v,v_vvvo,v_vvoo,v_vooo,energy)
   enddo
   !$OMP END DO nowait
 
-  !$OMP DO collapse(3)
-  do j = 1, nO
-    do k = 1, nO
-      do c = 1, nV
+  !$OMP DO 
+  do c = 1, nV
+    do j = 1, nO
+      do k = 1, nO
         do d = 1, nV
           T_voov(d,k,j,c) = t2(k,j,c,d)
         enddo
@@ -63,7 +63,7 @@ subroutine ccsd_par_t_space_v3(nO,nV,t1,t2,f_o,f_v,v_vvvo,v_vvoo,v_vooo,energy)
   !v_vooo(c,j,k,l) * t2(i,l,a,b) &
   !X_ooov(l,j,k,c) * T_oovv(l,i,a,b) &
 
-  !$OMP DO collapse(3)
+  !$OMP DO 
   do c = 1, nV
     do k = 1, nO
       do j = 1, nO
@@ -75,10 +75,10 @@ subroutine ccsd_par_t_space_v3(nO,nV,t1,t2,f_o,f_v,v_vvvo,v_vvoo,v_vooo,energy)
   enddo
   !$OMP END DO nowait
 
-  !$OMP DO collapse(3)
-  do i = 1, nO
+  !$OMP DO 
+  do a = 1, nV
     do b = 1, nV
-      do a = 1, nV
+      do i = 1, nO
         do l = 1, nO
           T_oovv(l,i,a,b) = t2(i,l,a,b)
         enddo
@@ -89,7 +89,7 @@ subroutine ccsd_par_t_space_v3(nO,nV,t1,t2,f_o,f_v,v_vvvo,v_vvoo,v_vooo,energy)
 
   !X_oovv(j,k,b,c) * T1_vo(a,i) &
 
-  !$OMP DO collapse(3)
+  !$OMP DO 
   do c = 1, nV
     do b = 1, nV
       do j = 1, nO
@@ -122,18 +122,20 @@ subroutine ccsd_par_t_space_v3(nO,nV,t1,t2,f_o,f_v,v_vvvo,v_vvoo,v_vooo,energy)
         delta_abc = f_v(a) + f_v(b) + f_v(c)
         call form_w_abc(nO,nV,a,b,c,T_voov,T_oovv,X_vovv,X_ooov,W_abc,W_cba,W_bca,W_cab,W_bac,W_acb)
         call form_v_abc(nO,nV,a,b,c,t1,X_oovv,W_abc,V_abc,W_cba,V_cba,W_bca,V_bca,W_cab,V_cab,W_bac,V_bac,W_acb,V_acb)
-        do i = 1, nO
+        do k = 1, nO
           do j = 1, nO
-            do k = 1, nO
+            do i = 1, nO
               delta = 1.d0 / (f_o(i) + f_o(j) + f_o(k) - delta_abc)
               e = e + delta * ( &
-                 (4d0 * W_abc(i,j,k) + W_bca(i,j,k) + W_cab(i,j,k)) * (V_abc(i,j,k) - V_cba(i,j,k)) + &
-                 (4d0 * W_acb(i,j,k) + W_cba(i,j,k) + W_bac(i,j,k)) * (V_acb(i,j,k) - V_bca(i,j,k)) + &
-                 (4d0 * W_bac(i,j,k) + W_acb(i,j,k) + W_cba(i,j,k)) * (V_bac(i,j,k) - V_cab(i,j,k)) + &
-                 (4d0 * W_bca(i,j,k) + W_cab(i,j,k) + W_abc(i,j,k)) * (V_bca(i,j,k) - V_acb(i,j,k)) + &
-                 (4d0 * W_cba(i,j,k) + W_bac(i,j,k) + W_acb(i,j,k)) * (V_cba(i,j,k) - V_abc(i,j,k)) + &
-                 (4d0 * W_cab(i,j,k) + W_abc(i,j,k) + W_bca(i,j,k)) * (V_cab(i,j,k) - V_bac(i,j,k)) + &
-                  0.d0)
+                 (4d0 * (W_abc(i,j,k) - W_cba(i,j,k)) + &
+                         W_bca(i,j,k) - W_bac(i,j,k)  + &
+                         W_cab(i,j,k) - W_acb(i,j,k)  ) * (V_abc(i,j,k) - V_cba(i,j,k)) + &
+                 (4d0 * (W_acb(i,j,k) - W_bca(i,j,k)) + &
+                         W_cba(i,j,k) - W_cab(i,j,k)  + &
+                         W_bac(i,j,k) - W_abc(i,j,k)  ) * (V_acb(i,j,k) - V_bca(i,j,k)) + &
+                 (4d0 * (W_bac(i,j,k) - W_cab(i,j,k)) + &
+                         W_acb(i,j,k) - W_abc(i,j,k)  + &
+                         W_cba(i,j,k) - W_bca(i,j,k)  ) * (V_bac(i,j,k) - V_cab(i,j,k)) )
             enddo
           enddo
         enddo
@@ -146,15 +148,14 @@ subroutine ccsd_par_t_space_v3(nO,nV,t1,t2,f_o,f_v,v_vvvo,v_vvoo,v_vooo,energy)
       delta_abc = f_v(a) + f_v(b) + f_v(c)
       call form_w_abc(nO,nV,a,b,c,T_voov,T_oovv,X_vovv,X_ooov,W_abc,W_cba,W_bca,W_cab,W_bac,W_acb)
       call form_v_abc(nO,nV,a,b,c,t1,X_oovv,W_abc,V_abc,W_cba,V_cba,W_bca,V_bca,W_cab,V_cab,W_bac,V_bac,W_acb,V_acb)
-      do i = 1, nO
+      do k = 1, nO
         do j = 1, nO
-          do k = 1, nO
-            delta = 1.d0 / (f_o(i) + f_o(j) + f_o(k) - delta_abc)
+          do i = 1, nO
+            delta = 1.0d0 / (f_o(i) + f_o(j) + f_o(k) - delta_abc)
             e = e + delta * ( &
                (4d0 * W_abc(i,j,k) + W_bca(i,j,k) + W_cab(i,j,k)) * (V_abc(i,j,k) - V_cba(i,j,k)) + &
                (4d0 * W_acb(i,j,k) + W_cba(i,j,k) + W_bac(i,j,k)) * (V_acb(i,j,k) - V_bca(i,j,k)) + &
-               (4d0 * W_bac(i,j,k) + W_acb(i,j,k) + W_cba(i,j,k)) * (V_bac(i,j,k) - V_cab(i,j,k)) + &
-                0.d0)
+               (4d0 * W_bac(i,j,k) + W_acb(i,j,k) + W_cba(i,j,k)) * (V_bac(i,j,k) - V_cab(i,j,k)) )
           enddo
         enddo
       enddo