diff --git a/opal/mca/pmix/pmix2x/pmix/VERSION b/opal/mca/pmix/pmix2x/pmix/VERSION
index 1fc38e10709..a9ea7ac6844 100644
--- a/opal/mca/pmix/pmix2x/pmix/VERSION
+++ b/opal/mca/pmix/pmix2x/pmix/VERSION
@@ -30,7 +30,7 @@ greek=
 # command, or with the date (if "git describe" fails) in the form of
 # "date<date>".
 
-repo_rev=git0de7b68
+repo_rev=git9526eb3
 
 # If tarball_version is not empty, it is used as the version string in
 # the tarball filename, regardless of all other versions listed in
@@ -44,7 +44,7 @@ tarball_version=
 
 # The date when this release was created
 
-date="Oct 05, 2017"
+date="Oct 06, 2017"
 
 # The shared library version of each of PMIx's public libraries.
 # These versions are maintained in accordance with the "Library
@@ -76,3 +76,5 @@ date="Oct 05, 2017"
 # format.
 
 libpmix_so_version=0:0:0
+libpmi_so_version=0:0:0
+libpmi2_so_version=0:0:0
diff --git a/opal/mca/pmix/pmix2x/pmix/config/pmix_setup_libevent.m4 b/opal/mca/pmix/pmix2x/pmix/config/pmix_setup_libevent.m4
index 76438639657..b8b013c5107 100644
--- a/opal/mca/pmix/pmix2x/pmix/config/pmix_setup_libevent.m4
+++ b/opal/mca/pmix/pmix2x/pmix/config/pmix_setup_libevent.m4
@@ -50,7 +50,7 @@ AC_DEFUN([_PMIX_LIBEVENT_EMBEDDED_MODE],[
  ])
 
 AC_DEFUN([_PMIX_LIBEVENT_EXTERNAL],[
-    PMIX_VAR_SCOPE_PUSH([pmix_event_dir pmix_event_libdir])
+    PMIX_VAR_SCOPE_PUSH([pmix_event_dir pmix_event_libdir pmix_event_defaults])
 
     AC_ARG_WITH([libevent],
                 [AC_HELP_STRING([--with-libevent=DIR],
@@ -67,17 +67,32 @@ AC_DEFUN([_PMIX_LIBEVENT_EXTERNAL],[
 
     AC_MSG_CHECKING([for libevent in])
     if test ! -z "$with_libevent" && test "$with_libevent" != "yes"; then
+        pmix_event_defaults=no
         pmix_event_dir=$with_libevent
         if test -d $with_libevent/lib; then
             pmix_event_libdir=$with_libevent/lib
         elif test -d $with_libevent/lib64; then
             pmix_event_libdir=$with_libevent/lib64
+        elif test -d $with_libevent; then
+            pmix_event_libdir=$with_libevent
         else
-            AC_MSG_RESULT([Could not find $with_libevent/lib or $with_libevent/lib64])
+            AC_MSG_RESULT([Could not find $with_libevent/lib, $with_libevent/lib64, or $with_libevent])
             AC_MSG_ERROR([Can not continue])
         fi
         AC_MSG_RESULT([$pmix_event_dir and $pmix_event_libdir])
     else
+        pmix_event_defaults=yes
+        pmix_event_dir=/usr/include
+        if test -d /usr/lib; then
+            pmix_event_libdir=/usr/lib
+        elif test -d /usr/lib64; then
+            pmix_event_libdir=/usr/lib64
+        else
+            AC_MSG_RESULT([not found])
+            AC_MSG_WARN([Could not find /usr/lib or /usr/lib64 - you may])
+            AC_MSG_WARN([to specify --with-libevent-libdir=<path>])
+            AC_MSG_ERROR([Can not continue])
+        fi
         AC_MSG_RESULT([(default search paths)])
     fi
     AS_IF([test ! -z "$with_libevent_libdir" && "$with_libevent_libdir" != "yes"],
@@ -92,11 +107,13 @@ AC_DEFUN([_PMIX_LIBEVENT_EXTERNAL],[
                        [$pmix_event_libdir],
                        [],
                        [AC_MSG_WARN([LIBEVENT SUPPORT NOT FOUND])
-                        AC_MSG_ERROR([CANNOT CONTINE])])
+                        AC_MSG_ERROR([CANNOT CONTINUE])])
+
+    AS_IF([test "$pmix_event_defaults" = "no"],
+          [PMIX_FLAGS_APPEND_UNIQ(CPPFLAGS, $pmix_libevent_CPPFLAGS)
+           PMIX_FLAGS_APPEND_UNIQ(LIBS, $pmix_libevent_LIBS)
+           PMIX_FLAGS_APPEND_UNIQ(LDFLAGS, $pmix_libevent_LDFLAGS)])
 
-    PMIX_FLAGS_APPEND_UNIQ(CPPFLAGS, $pmix_libevent_CPPFLAGS)
-    PMIX_FLAGS_APPEND_UNIQ(LIBS, $pmix_libevent_LIBS)
-    PMIX_FLAGS_APPEND_UNIQ(LDFLAGS, $pmix_libevent_LDFLAGS)
 
     # Ensure that this libevent has the symbol
     # "evthread_set_lock_callbacks", which will only exist if
diff --git a/opal/mca/pmix/pmix2x/pmix/configure.ac b/opal/mca/pmix/pmix2x/pmix/configure.ac
index 5bb1beaa072..9be66d9b45a 100644
--- a/opal/mca/pmix/pmix2x/pmix/configure.ac
+++ b/opal/mca/pmix/pmix2x/pmix/configure.ac
@@ -237,6 +237,8 @@ AC_SUBST([CONFIGURE_DEPENDENCIES], ['$(top_srcdir)/VERSION'])
 
 . $srcdir/VERSION
 AC_SUBST([libpmix_so_version])
+AC_SUBST([libpmi_so_version])
+AC_SUBST([libpmi2_so_version])
 
 AC_CONFIG_FILES(pmix_config_prefix[contrib/Makefile]
                 pmix_config_prefix[examples/Makefile]
diff --git a/opal/mca/pmix/pmix2x/pmix/src/Makefile.am b/opal/mca/pmix/pmix2x/pmix/src/Makefile.am
index 5302885d47d..c215cde1160 100644
--- a/opal/mca/pmix/pmix2x/pmix/src/Makefile.am
+++ b/opal/mca/pmix/pmix2x/pmix/src/Makefile.am
@@ -71,6 +71,14 @@ lib_LTLIBRARIES = libpmix.la
 libpmix_la_SOURCES = $(headers) $(sources)
 libpmix_la_LDFLAGS = -version-info $(libpmix_so_version)
 
+if WANT_PMI_BACKWARD
+lib_LTLIBRARIES += libpmi.la libpmi2.la
+libpmi_la_SOURCES = $(headers) $(sources)
+libpmi_la_LDFLAGS = -version-info $(libpmi_so_version)
+libpmi2_la_SOURCES = $(headers) $(sources)
+libpmi2_la_LDFLAGS = -version-info $(libpmi2_so_version)
+endif
+
 endif !PMIX_EMBEDDED_MODE
 
 include atomics/sys/Makefile.include
diff --git a/opal/mca/pmix/pmix2x/pmix/src/client/pmi1.c b/opal/mca/pmix/pmix2x/pmix/src/client/pmi1.c
index b56df7d25eb..1c8517ea0e7 100644
--- a/opal/mca/pmix/pmix2x/pmix/src/client/pmi1.c
+++ b/opal/mca/pmix/pmix2x/pmix/src/client/pmi1.c
@@ -45,11 +45,11 @@
 #define PMI_MAX_VAL_LEN      4096            /* Maximum size of a PMI value */
 
 
-#define PMI_CHECK() \
-        do {                     \
-        if (!pmi_init) {     \
-            return PMI_FAIL; \
-        }                    \
+#define PMI_CHECK()             \
+    do {                        \
+        if (!pmi_init) {        \
+            return PMI_FAIL;    \
+        }                       \
     } while (0)
 
 /* local functions */
@@ -57,6 +57,7 @@ static pmix_status_t convert_int(int *value, pmix_value_t *kv);
 static int convert_err(pmix_status_t rc);
 static pmix_proc_t myproc;
 static int pmi_init = 0;
+static bool pmi_singleton = false;
 
 PMIX_EXPORT int PMI_Init(int *spawned)
 {
@@ -66,7 +67,19 @@ PMIX_EXPORT int PMI_Init(int *spawned)
     pmix_info_t info[1];
     bool  val_optinal = 1;
 
-    if (PMIX_SUCCESS != PMIx_Init(&myproc, NULL, 0)) {
+    if (PMIX_SUCCESS != (rc = PMIx_Init(&myproc, NULL, 0))) {
+        /* if we didn't see a PMIx server (e.g., missing envar),
+         * then allow us to run as a singleton */
+        if (PMIX_ERR_INVALID_NAMESPACE == rc) {
+            if (NULL != spawned) {
+                *spawned = 0;
+            }
+            pmi_singleton = true;
+            (void)strncpy(myproc.nspace, "1234", PMIX_MAX_NSLEN);
+            myproc.rank = 0;
+            pmi_init = 1;
+            return PMI_SUCCESS;
+        }
         return PMI_ERR_INIT;
     }
 
@@ -109,7 +122,11 @@ PMIX_EXPORT int PMI_Initialized(PMI_BOOL *initialized)
         return PMI_ERR_INVALID_ARG;
     }
 
-    *initialized = (PMIx_Initialized() ? PMI_TRUE : PMI_FALSE);
+    if (pmi_singleton) {
+        *initialized = PMI_TRUE;
+    } else {
+        *initialized = (PMIx_Initialized() ? PMI_TRUE : PMI_FALSE);
+    }
 
     return PMI_SUCCESS;
 }
@@ -120,6 +137,10 @@ PMIX_EXPORT int PMI_Finalize(void)
 
     PMI_CHECK();
 
+    if (pmi_singleton) {
+        return PMI_SUCCESS;
+    }
+
     pmi_init = 0;
     rc = PMIx_Finalize(NULL, 0);
     return convert_err(rc);
@@ -131,6 +152,10 @@ PMIX_EXPORT int PMI_Abort(int flag, const char msg[])
 
     PMI_CHECK();
 
+    if (pmi_singleton) {
+        return PMI_SUCCESS;
+    }
+
     rc = PMIx_Abort(flag, msg, NULL, 0);
     return convert_err(rc);
 }
@@ -153,6 +178,9 @@ PMIX_EXPORT int PMI_KVS_Put(const char kvsname[], const char key[], const char v
     if ((value == NULL) || (strlen(value) > PMI_MAX_VAL_LEN)) {
         return PMI_ERR_INVALID_VAL;
     }
+    if (pmi_singleton) {
+        return PMI_SUCCESS;
+    }
 
     pmix_output_verbose(2, pmix_globals.debug_output,
             "PMI_KVS_Put: KVS=%s, key=%s value=%s", kvsname, key, value);
@@ -173,6 +201,9 @@ PMIX_EXPORT int PMI_KVS_Commit(const char kvsname[])
     if ((kvsname == NULL) || (strlen(kvsname) > PMI_MAX_KVSNAME_LEN)) {
         return PMI_ERR_INVALID_KVS;
     }
+    if (pmi_singleton) {
+        return PMI_SUCCESS;
+    }
 
     pmix_output_verbose(2, pmix_globals.debug_output, "PMI_KVS_Commit: KVS=%s",
             kvsname);
@@ -256,6 +287,10 @@ PMIX_EXPORT int PMI_Barrier(void)
 
     PMI_CHECK();
 
+    if (pmi_singleton) {
+        return PMI_SUCCESS;
+    }
+
     info = &buf;
     PMIX_INFO_CONSTRUCT(info);
     PMIX_INFO_LOAD(info, PMIX_COLLECT_DATA, &val, PMIX_BOOL);
@@ -282,6 +317,11 @@ PMIX_EXPORT int PMI_Get_size(int *size)
         return PMI_ERR_INVALID_ARG;
     }
 
+    if (pmi_singleton) {
+        *size = 1;
+        return PMI_SUCCESS;
+    }
+
     /* set controlling parameters
      * PMIX_OPTIONAL - expect that these keys should be available on startup
      */
@@ -326,6 +366,11 @@ PMIX_EXPORT int PMI_Get_universe_size(int *size)
         return PMI_ERR_INVALID_ARG;
     }
 
+    if (pmi_singleton) {
+        *size = 1;
+        return PMI_SUCCESS;
+    }
+
     /* set controlling parameters
      * PMIX_OPTIONAL - expect that these keys should be available on startup
      */
@@ -358,6 +403,11 @@ PMIX_EXPORT int PMI_Get_appnum(int *appnum)
         return PMI_ERR_INVALID_ARG;
     }
 
+    if (pmi_singleton) {
+        *appnum = 0;
+        return PMI_SUCCESS;
+    }
+
     /* set controlling parameters
      * PMIX_OPTIONAL - expect that these keys should be available on startup
      */
@@ -390,6 +440,10 @@ PMIX_EXPORT int PMI_Publish_name(const char service_name[], const char port[])
         return PMI_ERR_INVALID_ARG;
     }
 
+    if (pmi_singleton) {
+        return PMI_FAIL;
+    }
+
     /* pass the service/port */
     (void) strncpy(info.key, service_name, PMIX_MAX_KEYLEN);
     info.value.type = PMIX_STRING;
@@ -413,6 +467,10 @@ PMIX_EXPORT int PMI_Unpublish_name(const char service_name[])
         return PMI_ERR_INVALID_ARG;
     }
 
+    if (pmi_singleton) {
+        return PMI_FAIL;
+    }
+
     /* pass the service */
     keys[0] = (char*) service_name;
     keys[1] = NULL;
@@ -432,6 +490,10 @@ PMIX_EXPORT int PMI_Lookup_name(const char service_name[], char port[])
         return PMI_ERR_INVALID_ARG;
     }
 
+    if (pmi_singleton) {
+        return PMI_FAIL;
+    }
+
     PMIX_PDATA_CONSTRUCT(&pdata);
 
     /* pass the service */
@@ -512,6 +574,11 @@ PMIX_EXPORT int PMI_Get_clique_size(int *size)
         return PMI_ERR_INVALID_ARG;
     }
 
+    if (pmi_singleton) {
+        *size = 1;
+        return PMI_SUCCESS;
+    }
+
     /* set controlling parameters
      * PMIX_OPTIONAL - expect that these keys should be available on startup
      */
@@ -544,6 +611,11 @@ PMIX_EXPORT int PMI_Get_clique_ranks(int ranks[], int length)
         return PMI_ERR_INVALID_ARGS;
     }
 
+    if (pmi_singleton) {
+        ranks[0] = 0;
+        return PMI_SUCCESS;
+    }
+
     rc = PMIx_Get(&proc, PMIX_LOCAL_PEERS, NULL, 0, &val);
     if (PMIX_SUCCESS == rc) {
         /* kv will contain a string of comma-separated
@@ -655,6 +727,10 @@ PMIX_EXPORT int PMI_Spawn_multiple(int count,
         return PMI_ERR_INVALID_ARG;
     }
 
+    if (pmi_singleton) {
+        return PMI_FAIL;
+    }
+
     /* setup the apps */
     PMIX_APP_CREATE(apps, count);
     for (i = 0; i < count; i++) {
diff --git a/opal/mca/pmix/pmix2x/pmix/src/client/pmi2.c b/opal/mca/pmix/pmix2x/pmix/src/client/pmi2.c
index 300af1d937d..67818e9a35d 100644
--- a/opal/mca/pmix/pmix2x/pmix/src/client/pmi2.c
+++ b/opal/mca/pmix/pmix2x/pmix/src/client/pmi2.c
@@ -38,11 +38,11 @@
 
 #define ANL_MAPPING "PMI_process_mapping"
 
-#define PMI2_CHECK() \
-    do {                     \
-        if (!pmi2_init) {     \
-            return PMI2_FAIL; \
-        }                    \
+#define PMI2_CHECK()                \
+    do {                            \
+        if (!pmi2_init) {           \
+            return PMI2_FAIL;       \
+        }                           \
     } while (0)
 
 /* local functions */
@@ -51,6 +51,7 @@ static int convert_err(pmix_status_t rc);
 static pmix_proc_t myproc;
 static int pmi2_init = 0;
 static bool commit_reqd = false;
+static bool pmi2_singleton = false;
 
 PMIX_EXPORT int PMI2_Init(int *spawned, int *size, int *rank, int *appnum)
 {
@@ -61,7 +62,28 @@ PMIX_EXPORT int PMI2_Init(int *spawned, int *size, int *rank, int *appnum)
     pmix_proc_t proc = myproc;
     proc.rank = PMIX_RANK_WILDCARD;
 
-    if (PMIX_SUCCESS != PMIx_Init(&myproc, NULL, 0)) {
+    if (PMIX_SUCCESS != (rc = PMIx_Init(&myproc, NULL, 0))) {
+        /* if we didn't see a PMIx server (e.g., missing envar),
+         * then allow us to run as a singleton */
+        if (PMIX_ERR_INVALID_NAMESPACE == rc) {
+            if (NULL != spawned) {
+                *spawned = 0;
+            }
+            if (NULL != size) {
+                *size = 1;
+            }
+            if (NULL != rank) {
+                *rank = 0;
+            }
+            if (NULL != appnum) {
+                *appnum = 0;
+            }
+            pmi2_singleton = true;
+            (void)strncpy(myproc.nspace, "1234", PMIX_MAX_NSLEN);
+            myproc.rank = 0;
+            pmi2_init = 1;
+            return PMI2_SUCCESS;
+        }
         return PMI2_ERR_INIT;
     }
 
@@ -132,6 +154,10 @@ PMIX_EXPORT int PMI2_Init(int *spawned, int *size, int *rank, int *appnum)
 PMIX_EXPORT int PMI2_Initialized(void)
 {
     int initialized;
+    if (pmi2_singleton) {
+        return 1;
+    }
+
     initialized = (int)PMIx_Initialized();
     return initialized;
 }
@@ -143,6 +169,10 @@ PMIX_EXPORT int PMI2_Finalize(void)
     PMI2_CHECK();
 
     pmi2_init = 0;
+    if (pmi2_singleton) {
+        return PMI2_SUCCESS;
+    }
+
     rc = PMIx_Finalize(NULL, 0);
     return convert_err(rc);
 }
@@ -153,6 +183,10 @@ PMIX_EXPORT int PMI2_Abort(int flag, const char msg[])
 
     PMI2_CHECK();
 
+    if (pmi2_singleton) {
+        return PMI2_SUCCESS;
+    }
+
     rc = PMIx_Abort(flag, msg, NULL, 0);
     return convert_err(rc);
 }
@@ -179,6 +213,10 @@ PMIX_EXPORT int PMI2_Job_Spawn(int count, const char * cmds[],
         return PMI2_ERR_INVALID_ARGS;
     }
 
+    if (pmi2_singleton) {
+        return PMI2_FAIL;
+    }
+
     /* setup the apps */
     PMIX_APP_CREATE(apps, count);
     for (i=0; i < count; i++) {
@@ -264,6 +302,11 @@ PMIX_EXPORT int PMI2_Info_GetSize(int *size)
         return PMI2_ERR_INVALID_ARGS;
     }
 
+    if (pmi2_singleton) {
+        *size = 1;
+        return PMI2_SUCCESS;
+    }
+
     /* set controlling parameters
      * PMIX_OPTIONAL - expect that these keys should be available on startup
      */
@@ -291,6 +334,10 @@ PMIX_EXPORT int PMI2_Job_Connect(const char jobid[], PMI2_Connect_comm_t *conn)
         return PMI2_ERR_INVALID_ARGS;
     }
 
+    if (pmi2_singleton) {
+        return PMI2_FAIL;
+    }
+
     memset(proc.nspace, 0, sizeof(proc.nspace));
     (void)strncpy(proc.nspace, (jobid ? jobid : proc.nspace), sizeof(proc.nspace)-1);
     proc.rank = PMIX_RANK_WILDCARD;
@@ -305,6 +352,10 @@ PMIX_EXPORT int PMI2_Job_Disconnect(const char jobid[])
 
     PMI2_CHECK();
 
+    if (pmi2_singleton) {
+        return PMI2_SUCCESS;
+    }
+
     memset(proc.nspace, 0, sizeof(proc.nspace));
     (void)strncpy(proc.nspace, (jobid ? jobid : proc.nspace), sizeof(proc.nspace)-1);
     proc.rank = PMIX_RANK_WILDCARD;
@@ -324,6 +375,10 @@ PMIX_EXPORT int PMI2_KVS_Put(const char key[], const char value[])
         return PMI2_ERR_INVALID_ARG;
     }
 
+    if (pmi2_singleton) {
+        return PMI2_SUCCESS;
+    }
+
     pmix_output_verbose(3, pmix_globals.debug_output,
             "PMI2_KVS_Put: key=%s value=%s", key, value);
 
@@ -344,6 +399,10 @@ PMIX_EXPORT int PMI2_KVS_Fence(void)
 
     pmix_output_verbose(3, pmix_globals.debug_output, "PMI2_KVS_Fence");
 
+    if (pmi2_singleton) {
+        return PMI2_SUCCESS;
+    }
+
     if (PMIX_SUCCESS != (rc = PMIx_Commit())) {
         return convert_err(rc);
     }
@@ -435,6 +494,10 @@ PMIX_EXPORT int PMI2_Info_GetNodeAttr(const char name[],
         return PMI2_ERR_INVALID_ARG;
     }
 
+    if (pmi2_singleton) {
+        return PMI2_FAIL;
+    }
+
     /* set controlling parameters
      * PMIX_OPTIONAL - expect that these keys should be available on startup
      */
@@ -479,6 +542,10 @@ PMIX_EXPORT int PMI2_Info_PutNodeAttr(const char name[], const char value[])
         return PMI2_ERR_INVALID_ARG;
     }
 
+    if (pmi2_singleton) {
+        return PMI2_SUCCESS;
+    }
+
     val.type = PMIX_STRING;
     val.data.string = (char*)value;
     rc = PMIx_Put(PMIX_LOCAL, name, &val);
@@ -500,6 +567,10 @@ PMIX_EXPORT int PMI2_Info_GetJobAttr(const char name[], char value[], int valuel
         return PMI2_ERR_INVALID_ARG;
     }
 
+    if (pmi2_singleton) {
+        return PMI2_FAIL;
+    }
+
     /* set controlling parameters
      * PMIX_OPTIONAL - expect that these keys should be available on startup
      */
@@ -572,6 +643,10 @@ PMIX_EXPORT int PMI2_Nameserv_publish(const char service_name[],
         return PMI2_ERR_INVALID_ARG;
     }
 
+    if (pmi2_singleton) {
+        return PMI2_FAIL;
+    }
+
     /* pass the service/port */
     (void)strncpy(info[0].key, service_name, PMIX_MAX_KEYLEN);
     info[0].value.type = PMIX_STRING;
@@ -606,6 +681,10 @@ PMIX_EXPORT int PMI2_Nameserv_lookup(const char service_name[],
         return PMI2_ERR_INVALID_ARG;
     }
 
+    if (pmi2_singleton) {
+        return PMI2_FAIL;
+    }
+
     PMIX_PDATA_CONSTRUCT(&pdata[0]);
     PMIX_PDATA_CONSTRUCT(&pdata[1]);
 
@@ -659,6 +738,10 @@ PMIX_EXPORT int PMI2_Nameserv_unpublish(const char service_name[],
         return PMI2_ERR_INVALID_ARG;
     }
 
+    if (pmi2_singleton) {
+        return PMI2_FAIL;
+    }
+
     /* pass the service */
     keys[0] = (char*)service_name;
     keys[1] = NULL;
diff --git a/opal/mca/pmix/pmix2x/pmix/src/client/pmix_client.c b/opal/mca/pmix/pmix2x/pmix/src/client/pmix_client.c
index 8c09f5a2d1a..50673eb0b23 100644
--- a/opal/mca/pmix/pmix2x/pmix/src/client/pmix_client.c
+++ b/opal/mca/pmix/pmix2x/pmix/src/client/pmix_client.c
@@ -172,7 +172,7 @@ static void pmix_client_notify_recv(struct pmix_peer_t *peer,
             goto error;
         }
         /* check for non-default flag */
-        for (cnt=0; cnt < ninfo; cnt++) {
+        for (cnt=0; cnt < (int)ninfo; cnt++) {
             if (0 == strncmp(chain->info[cnt].key, PMIX_EVENT_NON_DEFAULT, PMIX_MAX_KEYLEN)) {
                 chain->nondefault = PMIX_INFO_TRUE(&chain->info[cnt]);
                 break;
@@ -672,7 +672,10 @@ PMIX_EXPORT pmix_status_t PMIx_Finalize(const pmix_info_t info[], size_t ninfo)
             for (n=0; n < ninfo; n++) {
                 if (0 == strcmp(PMIX_EMBED_BARRIER, info[n].key)) {
                     if (PMIX_INFO_TRUE(&info[n])) {
-                        PMIx_Fence(NULL, 0, NULL, 0);
+                        rc = PMIx_Fence(NULL, 0, NULL, 0);
+                        if (PMIX_SUCCESS != rc) {
+                            PMIX_ERROR_LOG(rc);
+                        }
                     }
                     break;
                 }
diff --git a/opal/mca/pmix/pmix2x/pmix/src/mca/bfrops/base/bfrop_base_copy.c b/opal/mca/pmix/pmix2x/pmix/src/mca/bfrops/base/bfrop_base_copy.c
index 337460ed754..40b0f48693c 100644
--- a/opal/mca/pmix/pmix2x/pmix/src/mca/bfrops/base/bfrop_base_copy.c
+++ b/opal/mca/pmix/pmix2x/pmix/src/mca/bfrops/base/bfrop_base_copy.c
@@ -409,15 +409,12 @@ pmix_status_t pmix_bfrops_base_copy_darray(pmix_data_array_t **dest,
     }
     p->type = src->type;
     p->size = src->size;
+    if (0 == p->size || NULL == src->array) {
+        return PMIX_SUCCESS;
+    }
+
     /* process based on type of array element */
     switch (src->type) {
-        p->type = src->type;
-        p->size = src->size;
-        if (0 == p->size || NULL == src->array) {
-            p->array = NULL;
-            p->size = 0;
-            break;
-        }
         case PMIX_UINT8:
         case PMIX_INT8:
         case PMIX_BYTE:
diff --git a/opal/mca/pmix/pmix2x/pmix/src/mca/bfrops/v20/copy.c b/opal/mca/pmix/pmix2x/pmix/src/mca/bfrops/v20/copy.c
index cea73032fbd..c4ad0b97b92 100644
--- a/opal/mca/pmix/pmix2x/pmix/src/mca/bfrops/v20/copy.c
+++ b/opal/mca/pmix/pmix2x/pmix/src/mca/bfrops/v20/copy.c
@@ -1060,15 +1060,12 @@ pmix_status_t pmix20_bfrop_copy_darray(pmix_data_array_t **dest,
     }
     p->type = src->type;
     p->size = src->size;
+    if (0 == p->size || NULL == src->array) {
+        return PMIX_SUCCESS;
+    }
+
     /* process based on type of array element */
     switch (src->type) {
-        p->type = src->type;
-        p->size = src->size;
-        if (0 == p->size || NULL == src->array) {
-            p->array = NULL;
-            p->size = 0;
-            break;
-        }
         case PMIX_UINT8:
         case PMIX_INT8:
         case PMIX_BYTE:
diff --git a/opal/mca/pmix/pmix2x/pmix/src/tool/pmix_tool.c b/opal/mca/pmix/pmix2x/pmix/src/tool/pmix_tool.c
index 24196cec366..ee43788ea54 100644
--- a/opal/mca/pmix/pmix2x/pmix/src/tool/pmix_tool.c
+++ b/opal/mca/pmix/pmix2x/pmix/src/tool/pmix_tool.c
@@ -162,7 +162,7 @@ static void pmix_tool_notify_recv(struct pmix_peer_t *peer,
             goto error;
         }
         /* check for non-default flag */
-        for (cnt=0; cnt < ninfo; cnt++) {
+        for (cnt=0; cnt < (int)ninfo; cnt++) {
             if (0 == strncmp(chain->info[cnt].key, PMIX_EVENT_NON_DEFAULT, PMIX_MAX_KEYLEN)) {
                 chain->nondefault = PMIX_INFO_TRUE(&chain->info[cnt]);
                 break;