diff --git a/src/fraggle/fraggle_generate.f90 b/src/fraggle/fraggle_generate.f90
index f9edee2f8..d8dbeb0de 100644
--- a/src/fraggle/fraggle_generate.f90
+++ b/src/fraggle/fraggle_generate.f90
@@ -515,14 +515,14 @@ module subroutine fraggle_generate_vel_vec(collider, lfailure)
          lfailure = E_residual < 0.0_DP
 
          do concurrent(i = 1:nfrag)
-            fragments%vb(:,i) = fragments%vc(:,i) + impactors%vbcom(:)
+            collider%fragments%vb(:,i) = collider%fragments%vc(:,i) + impactors%vbcom(:)
          end do
 
          impactors%vbcom(:) = 0.0_DP
          do concurrent(i = 1:nfrag)
-            impactors%vbcom(:) = impactors%vbcom(:) + fragments%mass(i) * fragments%vb(:,i) 
+            impactors%vbcom(:) = impactors%vbcom(:) + collider%fragments%mass(i) * collider%fragments%vb(:,i) 
          end do
-         impactors%vbcom(:) = impactors%vbcom(:) / fragments%mtot
+         impactors%vbcom(:) = impactors%vbcom(:) / collider%fragments%mtot
 
       end associate
       return
diff --git a/src/fraggle/fraggle_util.f90 b/src/fraggle/fraggle_util.f90
index a7452882b..b69a7aea3 100644
--- a/src/fraggle/fraggle_util.f90
+++ b/src/fraggle/fraggle_util.f90
@@ -188,7 +188,7 @@ module subroutine fraggle_util_set_mass_dist(self, param)
 
             fragments%density(istart:nfrag) = fragments%mtot / sum(volume(:))
             fragments%radius(istart:nfrag) = (3 * fragments%mass(istart:nfrag) / (4 * PI * fragments%density(istart:nfrag)))**(1.0_DP / 3.0_DP)
-            do i = istart, nfrag
+            do concurrent(i = istart:nfrag)
                fragments%Ip(:, i) = Ip_avg(:)
             end do
 
@@ -263,7 +263,7 @@ module subroutine fraggle_util_set_natural_scale_factors(self)
          impactors%Lspin(:,:)     = impactors%Lspin(:,:)     / collider%Lscale
          impactors%Lorbit(:,:)    = impactors%Lorbit(:,:)    / collider%Lscale
 
-         do i = 1, 2
+         do concurrent(i = 1:2)
             impactors%rot(:,i) = impactors%Lspin(:,i) / (impactors%mass(i) * impactors%radius(i)**2 * impactors%Ip(3,i))
          end do
 
@@ -311,7 +311,7 @@ module subroutine fraggle_util_set_original_scale_factors(self)
          impactors%vc        = impactors%vc        * collider%vscale
          impactors%Lspin     = impactors%Lspin     * collider%Lscale
          impactors%Lorbit    = impactors%Lorbit    * collider%Lscale
-         do i = 1, 2
+         do concurrent(i = 1:2)
             impactors%rot(:,i) = impactors%Lspin(:,i) * (impactors%mass(i) * impactors%radius(i)**2 * impactors%Ip(3,i))
          end do
    
@@ -323,7 +323,7 @@ module subroutine fraggle_util_set_original_scale_factors(self)
          fragments%rc(:,:)   = fragments%rc(:,:)     * collider%dscale
          fragments%vc(:,:)   = fragments%vc(:,:)     * collider%vscale
          fragments%rb(:,:)   = fragments%rb(:,:)     * collider%dscale
-         fragments%vc(:,:)   = fragments%vb(:,:)     * collider%vscale
+         fragments%vb(:,:)   = fragments%vb(:,:)     * collider%vscale
 
          impactors%Qloss = impactors%Qloss * collider%Escale