diff --git a/core/federated/RTI/rti_remote.c b/core/federated/RTI/rti_remote.c
index f3d540115..f26be4b66 100644
--- a/core/federated/RTI/rti_remote.c
+++ b/core/federated/RTI/rti_remote.c
@@ -787,8 +787,8 @@ void handle_address_query(uint16_t fed_id) {
     // the port number because it has not yet received an MSG_TYPE_ADDRESS_ADVERTISEMENT message
     // from this federate. In that case, it will respond by sending -1.
 
-    // Response message is also of type MSG_TYPE_ADDRESS_QUERY.
-    buffer[0] = MSG_TYPE_ADDRESS_QUERY;
+    // Response message is MSG_TYPE_ADDRESS_QUERY_REPLY.
+    buffer[0] = MSG_TYPE_ADDRESS_QUERY_REPLY;
 
     // Encode the port number.
     federate_info_t *remote_fed = GET_FED_INFO(remote_fed_id);
diff --git a/core/federated/federate.c b/core/federated/federate.c
index 46c5b89ed..0c9a7a578 100644
--- a/core/federated/federate.c
+++ b/core/federated/federate.c
@@ -1751,7 +1751,7 @@ void lf_connect_to_federate(uint16_t remote_federate_id) {
                 "Failed to read the requested port number for federate %d from RTI.",
                 remote_federate_id);
 
-        if (buffer[0] != MSG_TYPE_ADDRESS_QUERY) {
+        if (buffer[0] != MSG_TYPE_ADDRESS_QUERY_REPLY) {
             // Unexpected reply.  Could be that RTI has failed and sent a resignation.
             if (buffer[0] == MSG_TYPE_FAILED) {
                 lf_print_error_and_exit("RTI has failed.");
@@ -2699,8 +2699,8 @@ int lf_send_tagged_message(environment_t* env,
         if (message_type == MSG_TYPE_P2P_TAGGED_MESSAGE) {
             lf_print_warning("Failed to send message to %s. Dropping the message.", next_destination_str);
         } else {
-            lf_print_error_system_failure("Failed to send message to %s. Connection lost to the RTI.",
-                    next_destination_str);
+            lf_print_error_system_failure("Failed to send message to %s with error code %d (%s). Connection lost to the RTI.",
+                    next_destination_str, errno, strerror(errno));
         }
     }
     LF_MUTEX_UNLOCK(&lf_outbound_socket_mutex);
diff --git a/include/core/federated/network/net_common.h b/include/core/federated/network/net_common.h
index 8f2bc3f5a..d5d4b9307 100644
--- a/include/core/federated/network/net_common.h
+++ b/include/core/federated/network/net_common.h
@@ -525,12 +525,20 @@ THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  * Byte identifying a address query message, sent by a federate to RTI
  * to ask for another federate's address and port number.
  * The next two bytes are the other federate's ID.
- * The reply from the RTI will a port number (an int32_t), which is -1
+ */
+#define MSG_TYPE_ADDRESS_QUERY 13
+
+/**
+ * Byte identifying a address query message reply, sent by a RTI to a federate
+ * to reply with a remote federate's address and port number.
+ * The reply from the RTI will be a port number (an int32_t), which is -1
  * if the RTI does not know yet (it has not received MSG_TYPE_ADDRESS_ADVERTISEMENT from
  * the other federate), followed by the IP address of the other
  * federate (an IPV4 address, which has length INET_ADDRSTRLEN).
+ * The next four bytes (or sizeof(int32_t)) will be the port number.
+ * The next four bytes (or sizeof(in_addr), which is uint32_t) will be the ip address.
  */
-#define MSG_TYPE_ADDRESS_QUERY 13
+#define MSG_TYPE_ADDRESS_QUERY_REPLY 14
 
 /**
  * Byte identifying a message advertising the port for the TCP connection server
@@ -540,7 +548,7 @@ THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  * The sending federate will not wait for a response from the RTI and assumes its
  * request will be processed eventually by the RTI.
  */
-#define MSG_TYPE_ADDRESS_ADVERTISEMENT 14
+#define MSG_TYPE_ADDRESS_ADVERTISEMENT 15
 
 /**
  * Byte identifying a first message that is sent by a federate directly to another federate
@@ -551,7 +559,7 @@ THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  * federate does not expect this federate or federation to connect, it will respond
  * instead with MSG_TYPE_REJECT.
  */
-#define MSG_TYPE_P2P_SENDING_FED_ID 15
+#define MSG_TYPE_P2P_SENDING_FED_ID 16
 
 /**
  * Byte identifying a message to send directly to another federate.
@@ -562,7 +570,7 @@ THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  * The four bytes after will be the length of the message.
  * The ramaining bytes are the message.
  */
-#define MSG_TYPE_P2P_MESSAGE 16
+#define MSG_TYPE_P2P_MESSAGE 17
 
 /**
  * Byte identifying a timestamped message to send directly to another federate.
@@ -579,7 +587,7 @@ THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  * The next four bytes will be the microstep of the sender.
  * The ramaining bytes are the message.
  */
-#define MSG_TYPE_P2P_TAGGED_MESSAGE 17
+#define MSG_TYPE_P2P_TAGGED_MESSAGE 18
 
 ////////////////////////////////////////////////
 /**