diff --git a/common/utils/T/tracer/gui/notify.c b/common/utils/T/tracer/gui/notify.c
index 84fb161b6e..5798a01219 100644
--- a/common/utils/T/tracer/gui/notify.c
+++ b/common/utils/T/tracer/gui/notify.c
@@ -46,7 +46,7 @@ void unregister_notifier(gui *_g, unsigned long notifier_id) {
     if (g->notifiers[i].id == notifier_id) break;
 
   if (i == g->notifiers_count)
-    ERR("%s:%d: notifier_id %ld not found\n", __FILE__,__LINE__,notifier_id);
+    ERR("%s:%d: notifier_id %lu not found\n", __FILE__,__LINE__,notifier_id);
 
   free(g->notifiers[i].notification);
   memmove(g->notifiers + i, g->notifiers + i + 1,
diff --git a/common/utils/T/tracer/multi.c b/common/utils/T/tracer/multi.c
index 6a9de838c6..a381567eb3 100644
--- a/common/utils/T/tracer/multi.c
+++ b/common/utils/T/tracer/multi.c
@@ -261,6 +261,7 @@ int main(int n, char **v)
       if (fds == NULL) { perror("calloc"); exit(1); }
     }
     i = 0;
+    if (fds == NULL) { perror("null fds pointer"); exit(1); }
     fds[i].fd = l;
     fds[i].events = POLLIN;
     i++;
diff --git a/common/utils/T/tracer/textlog.c b/common/utils/T/tracer/textlog.c
index a123bf9bf5..18132176a7 100644
--- a/common/utils/T/tracer/textlog.c
+++ b/common/utils/T/tracer/textlog.c
@@ -195,5 +195,10 @@ int main(int n, char **v)
     handle_event(h, e);
   }
 
+  if (on_off_name != NULL)
+    free(on_off_name);
+  if (on_off_action != NULL)
+    free(on_off_action);
+
   return 0;
 }
diff --git a/common/utils/T/tracer/utils.c b/common/utils/T/tracer/utils.c
index 2452254cf9..39e04fb973 100644
--- a/common/utils/T/tracer/utils.c
+++ b/common/utils/T/tracer/utils.c
@@ -273,6 +273,6 @@ void PUTX2(OBUF *o, int i) {
 
 void PUTUL(OBUF *o, unsigned long l) {
   char s[128];
-  sprintf(s, "%ld", l);
+  sprintf(s, "%lu", l);
   PUTS(o, s);
 }
diff --git a/openair1/PHY/TOOLS/lte_phy_scope_tm4.c b/openair1/PHY/TOOLS/lte_phy_scope_tm4.c
index 8dd41548ab..5c7322e2e9 100644
--- a/openair1/PHY/TOOLS/lte_phy_scope_tm4.c
+++ b/openair1/PHY/TOOLS/lte_phy_scope_tm4.c
@@ -812,9 +812,6 @@ void phy_scope_UE(FD_lte_phy_scope_ue *form,
     free(bit1);
     free(bit_pdcch);
     free(llr_pdcch);
-    for (arx=0;arx<nb_antennas_rx;arx++) {
-        free(chest_t_abs[arx]);
-    }
 
     //This is done to avoid plotting old data when TB0 is disabled, and TB1 is mapped onto CW0
     /*if (phy_vars_ue->transmission_mode[eNB_id]==3 && phy_vars_ue->transmission_mode[eNB_id]==4){
diff --git a/openair3/S1AP/s1ap_eNB_trace.c b/openair3/S1AP/s1ap_eNB_trace.c
index 03c0ea4fb2..543ea9c511 100644
--- a/openair3/S1AP/s1ap_eNB_trace.c
+++ b/openair3/S1AP/s1ap_eNB_trace.c
@@ -107,7 +107,7 @@ int s1ap_eNB_handle_trace_start(uint32_t         assoc_id,
 {
     S1AP_TraceStart_t            *container;
     S1AP_TraceStartIEs_t         *ie;
-    struct s1ap_eNB_ue_context_s *ue_desc_p;
+    struct s1ap_eNB_ue_context_s *ue_desc_p = NULL;
     struct s1ap_eNB_mme_data_s   *mme_ref_p;
 
     DevAssert(pdu != NULL);
diff --git a/openair3/TEST/EPC_TEST/generate_scenario.c b/openair3/TEST/EPC_TEST/generate_scenario.c
index b8d9d9c588..b1a3297866 100644
--- a/openair3/TEST/EPC_TEST/generate_scenario.c
+++ b/openair3/TEST/EPC_TEST/generate_scenario.c
@@ -270,7 +270,7 @@ static void enb_config_display(void)
   printf( " ENB CONFIG FILE CONTENT LOADED:\n");
   printf( "----------------------------------------------------------------------\n");
   for (i = 0; i < g_enb_properties.number; i++) {
-    printf( "ENB CONFIG for instance %u:\n\n", i);
+    printf( "ENB CONFIG for instance %d:\n\n", i);
     printf( "\teNB name:           \t%s\n",g_enb_properties.properties[i]->eNB_name);
     printf( "\teNB ID:             \t%"PRIu32"\n",g_enb_properties.properties[i]->eNB_id);
     printf( "\tCell type:          \t%s\n",g_enb_properties.properties[i]->cell_type == CELL_MACRO_ENB ? "CELL_MACRO_ENB":"CELL_HOME_ENB");
diff --git a/openair3/TEST/EPC_TEST/play_scenario.c b/openair3/TEST/EPC_TEST/play_scenario.c
index 5928ab017f..a50eac95cf 100644
--- a/openair3/TEST/EPC_TEST/play_scenario.c
+++ b/openair3/TEST/EPC_TEST/play_scenario.c
@@ -1103,7 +1103,7 @@ et_config_parse_opt_line (
             fprintf(stderr, "Please provide a valid -D/--delay-on-exit argument, %s is not a valid value\n", delay_on_exit);
             exit(1);
           }
-          printf("Delay on exit is %u\n", delay_on_exit);
+          printf("Delay on exit is %d\n", (int) delay_on_exit);
         }
         break;