diff --git a/src/mpi/c/close_port.c b/src/mpi/c/close_port.c
index bbc5a12e5d..0239fe7bc1 100644
--- a/src/mpi/c/close_port.c
+++ b/src/mpi/c/close_port.c
@@ -30,12 +30,13 @@ int MPI_Close_port(char *port_name)
                                           FUNC_NAME);
     }
 
-    /* As far as I can see at the moment, this is an empty function.
-       Since we are relying on OOB, we did not allocate any 'address',
-       therefore we don't have to free an 'address'.
-    */
+    /* 
+     *  since the port_name is our own process_name_t structure,
+     *  we do not have to close anything or free a pointer.
+     *  This function is therefore just a dummy function
+     *  and fully implemented. I love these type functions,
+     *  we should have more of them :-). 
+     */
 
-    /* This function is not yet implemented */
-
-    return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_INTERN, FUNC_NAME);
+    return MPI_SUCCESS;
 }
diff --git a/src/mpi/c/comm_get_name.c b/src/mpi/c/comm_get_name.c
index 9770f42835..7af65a5e64 100644
--- a/src/mpi/c/comm_get_name.c
+++ b/src/mpi/c/comm_get_name.c
@@ -12,6 +12,7 @@
 #include "mpi/c/bindings.h"
 #include "runtime/runtime.h"
 #include "communicator/communicator.h"
+#include "threads/mutex.h"
 
 #if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
 #pragma weak MPI_Comm_get_name = PMPI_Comm_get_name
@@ -24,9 +25,8 @@
 static const char FUNC_NAME[] = "MPI_Comm_get_name";
 
 
-int MPI_Comm_get_name(MPI_Comm comm, char *name, int *length)  {
-
-    ompi_communicator_t* comp;
+int MPI_Comm_get_name(MPI_Comm comm, char *name, int *length)  
+{
 
     if ( MPI_PARAM_CHECK ) {
         OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
@@ -40,16 +40,16 @@ int MPI_Comm_get_name(MPI_Comm comm, char *name, int *length)  {
                                             FUNC_NAME);
     }
 
-    comp = (ompi_communicator_t*) comm;
-
-    if ( comp->c_flags & OMPI_COMM_NAMEISSET ) {
-        strncpy ( name, comp->c_name, MPI_MAX_OBJECT_NAME );
-        *length = strlen ( comp->c_name );
+    OMPI_THREAD_LOCK(&(comm->c_lock));
+    if ( comm->c_flags & OMPI_COMM_NAMEISSET ) {
+        strncpy ( name, comm->c_name, MPI_MAX_OBJECT_NAME );
+        *length = strlen ( comm->c_name );
     }
     else {
         memset ( name, 0, MPI_MAX_OBJECT_NAME );
         *length = 0;
     }
+    OMPI_THREAD_UNLOCK(&(comm->c_lock));
 
     return MPI_SUCCESS;
 }
diff --git a/src/mpi/c/comm_set_name.c b/src/mpi/c/comm_set_name.c
index 3751c956ab..875c26e689 100644
--- a/src/mpi/c/comm_set_name.c
+++ b/src/mpi/c/comm_set_name.c
@@ -24,9 +24,9 @@
 static const char FUNC_NAME[] = "MPI_Comm_set_name";
 
 
-int MPI_Comm_set_name(MPI_Comm comm, char *name) {
-
-    ompi_communicator_t* comp;
+int MPI_Comm_set_name(MPI_Comm comm, char *name) 
+{
+    int rc;
 
     if ( MPI_PARAM_CHECK ) {
         OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
@@ -42,15 +42,7 @@ int MPI_Comm_set_name(MPI_Comm comm, char *name) {
         }
     }
 
-    /* -- Thread safety entrance -- */
-
-    /* Copy in the name */
-    comp = (ompi_communicator_t*) comm;
-    
-    strncpy(comp->c_name, name, MPI_MAX_OBJECT_NAME);
-    comp->c_name[MPI_MAX_OBJECT_NAME - 1] = 0;
-    comp->c_flags |= OMPI_COMM_NAMEISSET;
-
+    rc = ompi_comm_set_name (comm, name );
     /* -- Tracing information for new communicator name -- */
 #if 0  
   /* Force TotalView DLL to take note of this name setting */
@@ -61,8 +53,5 @@ int MPI_Comm_set_name(MPI_Comm comm, char *name) {
 #if OMPI_PROFILING_DEFINES
 #include "mpi/c/profile/defines.h"
 #endif
-
-  /* -- Thread safety exit -- */
-  
-  return MPI_SUCCESS;
+   OMPI_ERRHANDLER_RETURN(rc, comm, rc, FUNC_NAME); 
 }
diff --git a/src/mpi/c/intercomm_merge.c b/src/mpi/c/intercomm_merge.c
index 0988431528..00aa9b03c9 100644
--- a/src/mpi/c/intercomm_merge.c
+++ b/src/mpi/c/intercomm_merge.c
@@ -25,7 +25,7 @@ static const char FUNC_NAME[] = "MPI_Intercomm_merge";
 int MPI_Intercomm_merge(MPI_Comm intercomm, int high,
                         MPI_Comm *newcomm) 
 {
-    ompi_communicator_t *newcomp;
+    ompi_communicator_t *newcomp=MPI_COMM_NULL;
     ompi_proc_t **procs=NULL;
     int local_size, remote_size;
     int local_rank;
@@ -53,11 +53,16 @@ int MPI_Intercomm_merge(MPI_Comm intercomm, int high,
     total_size  = local_size + remote_size;
     procs = (ompi_proc_t **) malloc ( total_size * sizeof(ompi_proc_t *));
     if ( NULL == procs ) {
-        return OMPI_ERRHANDLER_INVOKE(intercomm,MPI_ERR_INTERN,
-                                      FUNC_NAME);
+        rc = MPI_ERR_INTERN;
+        goto exit;
     }
     
     first = ompi_comm_determine_first ( intercomm, thigh );
+    if ( MPI_UNDEFINED == first ) {
+        rc = MPI_ERR_INTERN;
+        goto exit;
+    }
+
     if ( first ) {
         memcpy ( procs, intercomm->c_local_group->grp_proc_pointers, 
                  local_size * sizeof(ompi_proc_t *));
@@ -109,6 +114,9 @@ int MPI_Intercomm_merge(MPI_Comm intercomm, int high,
         free ( procs );
     }
     if ( MPI_SUCCESS != rc ) {
+        if ( MPI_COMM_NULL != newcomp ) {
+            OBJ_RELEASE(newcomp);
+        }
         *newcomm = MPI_COMM_NULL;
         return OMPI_ERRHANDLER_INVOKE(intercomm, rc,  FUNC_NAME);
     }
diff --git a/src/mpi/c/open_port.c b/src/mpi/c/open_port.c
index df9853bbf8..3006399c26 100644
--- a/src/mpi/c/open_port.c
+++ b/src/mpi/c/open_port.c
@@ -9,6 +9,8 @@
 #include "info/info.h"
 #include "runtime/runtime.h"
 #include "communicator/communicator.h"
+#include "proc/proc.h"
+#include "mca/ns/base/base.h"
 
 #if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
 #pragma weak MPI_Open_port = PMPI_Open_port
@@ -23,6 +25,10 @@ static const char FUNC_NAME[] = "MPI_Open_port";
 
 int MPI_Open_port(MPI_Info info, char *port_name) 
 {
+    ompi_proc_t **myproc=NULL;
+    char *name=NULL;
+    size_t size;
+
     if ( MPI_PARAM_CHECK ) {
         OMPI_ERR_INIT_FINALIZE(FUNC_NAME); 
 
@@ -35,23 +41,25 @@ int MPI_Open_port(MPI_Info info, char *port_name)
     if ( MPI_INFO_NULL != info ) {
         /* in theory, they user might tell us here
            how to establish the address. Since our communication
-           is relying on OOB, we probably
-           won't use the info-object.
+           is relying on OOB, we probably won't use the info-object.
 
-           potential values defined in MPI-2:
-           - "ip_port" : value contains IP port number
+           Potential values defined in MPI-2:
+           - "ip_port"    : value contains IP port number
            - "ip_address" : value contains IP address
         */
     }
 
-    /* According to our current understanding, the port_name will
-       be the OOB-name. No real port has to be opne, since
-       OOB always accepts new connections (e.g. has a pending accept).
-       
-       memcpy ( port_name, oob-whatever-fcnt, strlen(oob-whatever-fctn));
+    /* The port_name is equal to the OOB-contact information. 
+       No real port has to be open, since OOB always accepts new 
+       connections (e.g. has a pending accept).
     */
+  
+    myproc = ompi_proc_self (&size);
+    name = ompi_name_server.get_proc_name_string (&(myproc[0]->proc_name));
+    strncpy (port_name, name, MPI_MAX_PORT_NAME);
 
-    /* This function is not yet implemented */
-
-    return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_OTHER, FUNC_NAME);
+    free ( myproc );
+    free ( name );
+    
+    return MPI_SUCCESS;
 }