diff --git a/coreapi/bellesip_sal/sal_impl.c b/coreapi/bellesip_sal/sal_impl.c
index 33d44cec7..b037bbf60 100644
--- a/coreapi/bellesip_sal/sal_impl.c
+++ b/coreapi/bellesip_sal/sal_impl.c
@@ -107,7 +107,17 @@ static void process_dialog_terminated(void *sal, const belle_sip_dialog_terminat
 	}
 }
 static void process_io_error(void *user_ctx, const belle_sip_io_error_event_t *event){
-	ms_error("process_io_error not implemented yet");
+	belle_sip_client_transaction_t*client_transaction;
+	SalOp* op;
+	if (belle_sip_object_is_instance_of(BELLE_SIP_OBJECT(belle_sip_io_error_event_get_source(event)),BELLE_SIP_TYPE_ID(belle_sip_client_transaction_t))) {
+		client_transaction=BELLE_SIP_CLIENT_TRANSACTION(belle_sip_io_error_event_get_source(event));
+		op = (SalOp*)belle_sip_transaction_get_application_data(BELLE_SIP_TRANSACTION(client_transaction));
+		if (op->callbacks.process_io_error) {
+				op->callbacks.process_io_error(op,event);
+		}
+	} else {
+		ms_error("process_io_error not implemented yet for non transaction");
+	}
 }
 static void process_request_event(void *sal, const belle_sip_request_event_t *event) {
 	SalOp* op=NULL;
@@ -580,3 +590,6 @@ void sal_set_dscp(Sal *ctx, int dscp){
 void  sal_set_send_error(Sal *sal,int value) {
 	 belle_sip_stack_set_send_error(sal->stack,value);
 }
+void  sal_set_recv_error(Sal *sal,int value) {
+	 belle_sip_provider_set_recv_error(sal->prov,value);
+}
diff --git a/coreapi/bellesip_sal/sal_op_call.c b/coreapi/bellesip_sal/sal_op_call.c
index 74db3bba1..a39cc3dbb 100644
--- a/coreapi/bellesip_sal/sal_op_call.c
+++ b/coreapi/bellesip_sal/sal_op_call.c
@@ -82,7 +82,7 @@ static int set_sdp_from_desc(belle_sip_message_t *msg, const SalMediaDescription
 
 }
 static void call_process_io_error(void *user_ctx, const belle_sip_io_error_event_t *event){
-	ms_error("process_io_error not implemented yet");
+	ms_error("call_process_io_error not implemented yet");
 }
 static void process_dialog_terminated(void *ctx, const belle_sip_dialog_terminated_event_t *event) {
 	SalOp* op=(SalOp*)ctx;
diff --git a/coreapi/bellesip_sal/sal_op_impl.c b/coreapi/bellesip_sal/sal_op_impl.c
index bd5af0598..a22c5392a 100644
--- a/coreapi/bellesip_sal/sal_op_impl.c
+++ b/coreapi/bellesip_sal/sal_op_impl.c
@@ -34,6 +34,7 @@ void sal_op_release(SalOp *op){
 		belle_sip_refresher_stop(op->registration_refresher);
 		belle_sip_object_unref(op->registration_refresher);
 	}
+	if (op->pending_inv_client_trans) belle_sip_object_unref(op->pending_inv_client_trans);
 	__sal_op_free(op);
 	return ;
 }
@@ -135,7 +136,9 @@ int sal_op_send_request(SalOp* op, belle_sip_request_t* request) {
 	client_transaction = belle_sip_provider_create_client_transaction(prov,request);
 	belle_sip_transaction_set_application_data(BELLE_SIP_TRANSACTION(client_transaction),op);
 	if ( strcmp("INVITE",belle_sip_request_get_method(request))==0) {
+		if (op->pending_inv_client_trans) belle_sip_object_unref(op->pending_inv_client_trans);
 		op->pending_inv_client_trans=client_transaction; /*update pending inv for being able to cancel*/
+		belle_sip_object_ref(op->pending_inv_client_trans);
 	}
 	
 	if (!belle_sip_message_get_header(BELLE_SIP_MESSAGE(request),BELLE_SIP_AUTHORIZATION)
diff --git a/coreapi/bellesip_sal/sal_op_registration.c b/coreapi/bellesip_sal/sal_op_registration.c
index d4c6c37eb..4f5036ae2 100644
--- a/coreapi/bellesip_sal/sal_op_registration.c
+++ b/coreapi/bellesip_sal/sal_op_registration.c
@@ -21,7 +21,11 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 
 static void register_process_io_error(void *user_ctx, const belle_sip_io_error_event_t *event){
-	ms_error("process_io_error not implemented yet");
+	SalOp* op = (SalOp*)user_ctx;
+	ms_error("register_process_io_error io error reported for [%s]",sal_op_get_proxy(op));
+	if (op->registration_refresher) {
+		op->base.root->callbacks.register_failure(op,SalErrorFailure,SalErrorFailure,"io error");
+	}
 }
 
 static void register_refresher_listener ( const belle_sip_refresher_t* refresher
@@ -46,53 +50,16 @@ static void register_response_event(void *user_ctx, const belle_sip_response_eve
 	belle_sip_client_transaction_t* client_transaction = belle_sip_response_event_get_client_transaction(event);
 	SalOp* op = (SalOp*)belle_sip_transaction_get_application_data(BELLE_SIP_TRANSACTION(client_transaction));
 	belle_sip_response_t* response = belle_sip_response_event_get_response(event);
-/*	belle_sip_request_t* original_request=belle_sip_transaction_get_request(BELLE_SIP_TRANSACTION(client_transaction));
-	belle_sip_header_expires_t* expires_header;
-	belle_sip_header_contact_t* original_contact=belle_sip_message_get_header_by_type(original_request,belle_sip_header_contact_t);
-	const belle_sip_list_t* contact_header_list;
-	char* tmp_string;*/
-
-
 	belle_sip_header_service_route_t* service_route;
 	belle_sip_header_address_t* service_route_address=NULL;
 
 	int response_code = belle_sip_response_get_status_code(response);
-	/*int expires=-1;*/
 	if (response_code<200) return;/*nothing to do*/
 
 
 	switch (response_code) {
 	case 200: {
 
-/*		contact_header_list = belle_sip_message_get_headers(BELLE_SIP_MESSAGE(response),BELLE_SIP_CONTACT);
-		if (contact_header_list) {
-			contact_header_list = belle_sip_list_find_custom((belle_sip_list_t*)contact_header_list,(belle_sip_compare_func)belle_sip_header_contact_not_equals, (const void*)original_contact);
-			if (!contact_header_list) {
-				reset header list
-				contact_header_list = belle_sip_message_get_headers(BELLE_SIP_MESSAGE(response),BELLE_SIP_CONTACT);
-				contact_header_list = belle_sip_list_find_custom((belle_sip_list_t*)contact_header_list,(belle_sip_compare_func)belle_sip_header_contact_not_equals, (const void*)sal_op_get_contact_address(op));
-			}
-			if (!contact_header_list) {
-				tmp_string=belle_sip_object_to_string(BELLE_SIP_OBJECT(original_contact));
-				ms_error("no matching contact neither for [%s] nor [%s]", tmp_string, sal_op_get_contact(op));
-				belle_sip_free(tmp_string);
-			} else {
-				expires=belle_sip_header_contact_get_expires(BELLE_SIP_HEADER_CONTACT(contact_header_list->data));
-			}
-		}
-
-		if (expires<0 ) {
-			no contact with expire, looking for Expires header
-			if ((expires_header=(belle_sip_header_expires_t*)belle_sip_message_get_header(BELLE_SIP_MESSAGE(response),BELLE_SIP_EXPIRES))) {
-				expires = belle_sip_header_expires_get_expires(expires_header);
-			}
-		}
-		if (expires<0) {
-			if ((expires_header=(belle_sip_header_expires_t*)belle_sip_message_get_header(BELLE_SIP_MESSAGE(original_request),BELLE_SIP_EXPIRES))) {
-				expires = belle_sip_header_expires_get_expires(expires_header);
-				ms_message("Neither Expires header nor corresponding Contact header found, using expires value [%i] from request",expires);
-			}
-		}*/
 		/*check service route rfc3608*/
 		if ((service_route=belle_sip_message_get_header_by_type(response,belle_sip_header_service_route_t))) {
 			service_route_address=belle_sip_header_address_create(NULL,belle_sip_header_address_get_uri(BELLE_SIP_HEADER_ADDRESS(service_route)));
diff --git a/coreapi/sal.h b/coreapi/sal.h
index 1084ebce6..0f5c646b9 100644
--- a/coreapi/sal.h
+++ b/coreapi/sal.h
@@ -491,4 +491,6 @@ void __sal_op_free(SalOp *b);
 /*test api*/
 /*0 for no error*/
 void sal_set_send_error(Sal *sal,int value);
+/*1 for no error*/
+void sal_set_recv_error(Sal *sal,int value);
 #endif
diff --git a/tester/register_tester.c b/tester/register_tester.c
index 826c3703d..a655a8c86 100644
--- a/tester/register_tester.c
+++ b/tester/register_tester.c
@@ -235,6 +235,25 @@ static void network_state_change(){
 	linphone_core_destroy(lc);
 }
 
+static void io_recv_error(){
+	LinphoneCoreVTable v_table;
+	LinphoneCore* lc;
+	int register_ok;
+	stats* counters ;
+
+	memset (&v_table,0,sizeof(LinphoneCoreVTable));
+	v_table.registration_state_changed=registration_state_changed;
+	lc=configure_lc(&v_table);
+	counters = (stats*)linphone_core_get_user_data(lc);
+	register_ok=counters->number_of_LinphoneRegistrationOk;
+	sal_set_recv_error(lc->sal, 0);
+
+	CU_ASSERT_TRUE_FATAL(wait_for(lc,lc,&counters->number_of_LinphoneRegistrationFailed,register_ok-1 /*because 1 udp*/));
+	sal_set_recv_error(lc->sal, 1); /*reset*/
+
+	linphone_core_destroy(lc);
+}
+
 int register_test_suite () {
 
 	CU_pSuite pSuite = CU_add_suite("Register", NULL, NULL);
@@ -272,6 +291,9 @@ int register_test_suite () {
 	if (NULL == CU_add_test(pSuite, "network_state_change", network_state_change)) {
 			return CU_get_error();
 	}
+	if (NULL == CU_add_test(pSuite, "io_recv_error_0", io_recv_error)) {
+			return CU_get_error();
+	}
 
 	return 0;
 }