diff --git a/src/Determinants/H_apply.irp.f b/src/Determinants/H_apply.irp.f
index 28513597..b8604e8b 100644
--- a/src/Determinants/H_apply.irp.f
+++ b/src/Determinants/H_apply.irp.f
@@ -350,12 +350,12 @@ subroutine push_pt2(zmq_socket_push,pt2,norm_pert,H_pert_diag,N_st,task_id)
   endif
 
 ! Activate if zmq_socket_push is a REQ
-!  integer :: idummy
-!  rc = f77_zmq_recv( zmq_socket_push, idummy, 4, 0)
-!  if (rc /= 4) then
-!    print *, irp_here, 'f77_zmq_send( zmq_socket_push, idummy, 4, 0)'
-!    stop 'error'
-!  endif
+  integer :: idummy
+  rc = f77_zmq_recv( zmq_socket_push, idummy, 4, 0)
+  if (rc /= 4) then
+    print *, irp_here, 'f77_zmq_send( zmq_socket_push, idummy, 4, 0)'
+    stop 'error'
+  endif
 end
 
 subroutine pull_pt2(zmq_socket_pull,pt2,norm_pert,H_pert_diag,N_st,n,task_id)
@@ -411,11 +411,11 @@ subroutine pull_pt2(zmq_socket_pull,pt2,norm_pert,H_pert_diag,N_st,n,task_id)
   endif
 
 ! Activate if zmq_socket_pull is a REP
-!  rc = f77_zmq_send( zmq_socket_pull, 0, 4, 0)
-!  if (rc /= 4) then
-!    print *, irp_here,  'f77_zmq_send( zmq_socket_pull, 0, 4, 0)'
-!    stop 'error'
-!  endif
+  rc = f77_zmq_send( zmq_socket_pull, 0, 4, 0)
+  if (rc /= 4) then
+    print *, irp_here,  'f77_zmq_send( zmq_socket_pull, 0, 4, 0)'
+    stop 'error'
+  endif
 
 end
 
diff --git a/src/Integrals_Bielec/ao_bielec_integrals_in_map_slave.irp.f b/src/Integrals_Bielec/ao_bielec_integrals_in_map_slave.irp.f
index 6102d119..4e2f7152 100644
--- a/src/Integrals_Bielec/ao_bielec_integrals_in_map_slave.irp.f
+++ b/src/Integrals_Bielec/ao_bielec_integrals_in_map_slave.irp.f
@@ -57,12 +57,12 @@ subroutine push_integrals(zmq_socket_push, n_integrals, buffer_i, buffer_value,
   endif
 
 ! Activate is zmq_socket_push is a REQ
-!  integer :: idummy
-!  rc = f77_zmq_recv( zmq_socket_push, idummy, 4, 0)
-!  if (rc /= 4) then
-!    print *, irp_here, 'f77_zmq_send( zmq_socket_push, idummy, 4, 0)'
-!    stop 'error'
-!  endif
+  integer :: idummy
+  rc = f77_zmq_recv( zmq_socket_push, idummy, 4, 0)
+  if (rc /= 4) then
+    print *, irp_here, 'f77_zmq_send( zmq_socket_push, idummy, 4, 0)'
+    stop 'error'
+  endif
 end
 
 
@@ -167,11 +167,11 @@ subroutine pull_integrals(zmq_socket_pull, n_integrals, buffer_i, buffer_value,
   endif
 
 ! Activate if zmq_socket_pull is a REP
-!  rc = f77_zmq_send( zmq_socket_pull, 0, 4, 0)
-!  if (rc /= 4) then
-!    print *,  irp_here, ' f77_zmq_send (zmq_socket_pull,...'
-!    stop 'error'
-!  endif
+  rc = f77_zmq_send( zmq_socket_pull, 0, 4, 0)
+  if (rc /= 4) then
+    print *,  irp_here, ' f77_zmq_send (zmq_socket_pull,...'
+    stop 'error'
+  endif
 
 end
 
diff --git a/src/ZMQ/utils.irp.f b/src/ZMQ/utils.irp.f
index d730f612..b161f26d 100644
--- a/src/ZMQ/utils.irp.f
+++ b/src/ZMQ/utils.irp.f
@@ -217,8 +217,8 @@ function new_zmq_pull_socket()
   integer(ZMQ_PTR)               :: new_zmq_pull_socket
   
   call omp_set_lock(zmq_lock)
-  new_zmq_pull_socket = f77_zmq_socket(zmq_context, ZMQ_PULL)
-!  new_zmq_pull_socket = f77_zmq_socket(zmq_context, ZMQ_REP)
+!  new_zmq_pull_socket = f77_zmq_socket(zmq_context, ZMQ_PULL)
+  new_zmq_pull_socket = f77_zmq_socket(zmq_context, ZMQ_REP)
   call omp_unset_lock(zmq_lock)
   if (new_zmq_pull_socket == 0_ZMQ_PTR) then
      stop 'Unable to create zmq pull socket'
@@ -267,8 +267,8 @@ function new_zmq_push_socket(thread)
   integer(ZMQ_PTR)               :: new_zmq_push_socket
   
   call omp_set_lock(zmq_lock)
-  new_zmq_push_socket = f77_zmq_socket(zmq_context, ZMQ_PUSH)
-!  new_zmq_push_socket = f77_zmq_socket(zmq_context, ZMQ_REQ)
+!  new_zmq_push_socket = f77_zmq_socket(zmq_context, ZMQ_PUSH)
+  new_zmq_push_socket = f77_zmq_socket(zmq_context, ZMQ_REQ)
   call omp_unset_lock(zmq_lock)
   if (new_zmq_push_socket == 0_ZMQ_PTR) then
      stop 'Unable to create zmq push socket'