diff --git a/features/FEATURE_COMMON_PAL/mbed-coap/CHANGELOG.md b/features/FEATURE_COMMON_PAL/mbed-coap/CHANGELOG.md
index b2e282fe54..9b2c59ed47 100644
--- a/features/FEATURE_COMMON_PAL/mbed-coap/CHANGELOG.md
+++ b/features/FEATURE_COMMON_PAL/mbed-coap/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Change Log
 
+## [v4.0.3](https://github.com/ARMmbed/mbed-coap/releases/tag/v4.0.3)
+
+-[Full Changelog](https://github.com/ARMmbed/mbed-coap/compare/v4.0.2...v4.0.3)
+
+ **New feature**
+ 		
+ 	- CoAP Protocol Confirmable resend fix and minor memory optimization (IOTMAC-328)
+ 		
+ **Closed issues:**
+ 		
+ 	- IOTCLT-1439 - stuck in while loop
+
 ## [v4.0.0](https://github.com/ARMmbed/mbed-coap/releases/tag/v4.0.2)
 
 **New feature**
diff --git a/features/FEATURE_COMMON_PAL/mbed-coap/mbed-coap/sn_coap_protocol.h b/features/FEATURE_COMMON_PAL/mbed-coap/mbed-coap/sn_coap_protocol.h
index 2fee18e1c8..b9fbdc63ac 100644
--- a/features/FEATURE_COMMON_PAL/mbed-coap/mbed-coap/sn_coap_protocol.h
+++ b/features/FEATURE_COMMON_PAL/mbed-coap/mbed-coap/sn_coap_protocol.h
@@ -83,7 +83,8 @@ extern int8_t sn_coap_protocol_destroy(struct coap_s *handle);
  *         In failure cases:\n
  *          -1 = Failure in CoAP header structure\n
  *          -2 = Failure in given pointer (= NULL)\n
- *          -3 = Failure in Reset message\ŋ
+ *          -3 = Failure in Reset message\n
+ *          -4 = Failure in Resending message store\n
  *         If there is not enough memory (or User given limit exceeded) for storing
  *         resending messages, situation is ignored.
  */
diff --git a/features/FEATURE_COMMON_PAL/mbed-coap/module.json b/features/FEATURE_COMMON_PAL/mbed-coap/module.json
index c03d51e4cf..b581d6bac6 100644
--- a/features/FEATURE_COMMON_PAL/mbed-coap/module.json
+++ b/features/FEATURE_COMMON_PAL/mbed-coap/module.json
@@ -1,6 +1,6 @@
 {
   "name": "mbed-coap",
-  "version": "4.0.2",
+  "version": "4.0.3",
   "description": "COAP library",
   "keywords": [
     "coap",
diff --git a/features/FEATURE_COMMON_PAL/mbed-coap/source/include/sn_coap_header_internal.h b/features/FEATURE_COMMON_PAL/mbed-coap/source/include/sn_coap_header_internal.h
index 0a6d5936cb..f00dd7d7cd 100644
--- a/features/FEATURE_COMMON_PAL/mbed-coap/source/include/sn_coap_header_internal.h
+++ b/features/FEATURE_COMMON_PAL/mbed-coap/source/include/sn_coap_header_internal.h
@@ -64,8 +64,6 @@ typedef struct sn_nsdl_transmit_ {
 
     uint16_t                packet_len;
     uint8_t                *packet_ptr;
-    uint8_t                *uri_path_ptr;
-    uint8_t                uri_path_len;
 } sn_nsdl_transmit_s;
 
 /* * * * * * * * * * * * * * * * * * * * * * */
diff --git a/features/FEATURE_COMMON_PAL/mbed-coap/source/sn_coap_builder.c b/features/FEATURE_COMMON_PAL/mbed-coap/source/sn_coap_builder.c
index 5a530122a4..0901fd0086 100644
--- a/features/FEATURE_COMMON_PAL/mbed-coap/source/sn_coap_builder.c
+++ b/features/FEATURE_COMMON_PAL/mbed-coap/source/sn_coap_builder.c
@@ -174,21 +174,16 @@ uint16_t sn_coap_builder_calc_needed_packet_data_size_2(sn_coap_hdr_s *src_coap_
             returned_byte_count += src_coap_msg_ptr->token_len;
         }
         /* URI PATH - Repeatable option. Length of one option is 0-255 */
-        /* Do not add uri-path for notification message.
-         * Uri-path is needed for cancelling observation with RESET message */
-        if (!src_coap_msg_ptr->options_list_ptr ||
-                (src_coap_msg_ptr->options_list_ptr &&
-                 COAP_OBSERVE_NONE == src_coap_msg_ptr->options_list_ptr->observe)) {
-            if (src_coap_msg_ptr->uri_path_ptr != NULL) {
-                repeatable_option_size = sn_coap_builder_options_calc_option_size(src_coap_msg_ptr->uri_path_len,
-                                         src_coap_msg_ptr->uri_path_ptr, COAP_OPTION_URI_PATH);
-                if (repeatable_option_size) {
-                    returned_byte_count += repeatable_option_size;
-                } else {
-                    return 0;
-                }
+        if (src_coap_msg_ptr->uri_path_ptr != NULL) {
+            repeatable_option_size = sn_coap_builder_options_calc_option_size(src_coap_msg_ptr->uri_path_len,
+                                     src_coap_msg_ptr->uri_path_ptr, COAP_OPTION_URI_PATH);
+            if (repeatable_option_size) {
+                returned_byte_count += repeatable_option_size;
+            } else {
+                return 0;
             }
         }
+
         uint16_t tempInt = 0;
         /* CONTENT FORMAT - An integer option, up to 2 bytes */
         if (src_coap_msg_ptr->content_format != COAP_CT_NONE) {
@@ -574,13 +569,8 @@ static int8_t sn_coap_builder_options_build(uint8_t **dst_packet_data_pptr, sn_c
                      &src_coap_msg_ptr->options_list_ptr->location_path_len, COAP_OPTION_LOCATION_PATH, &previous_option_number);
     }
     /* * * * Build Uri-Path option * * * */
-    /* Do not add uri-path for notification message.
-     * Uri-path is needed for cancelling observation with RESET message */
-    if (!src_coap_msg_ptr->options_list_ptr ||
-            (src_coap_msg_ptr->options_list_ptr &&
-             COAP_OBSERVE_NONE == src_coap_msg_ptr->options_list_ptr->observe))
-        sn_coap_builder_options_build_add_multiple_option(dst_packet_data_pptr, &src_coap_msg_ptr->uri_path_ptr,
-                 &src_coap_msg_ptr->uri_path_len, COAP_OPTION_URI_PATH, &previous_option_number);
+    sn_coap_builder_options_build_add_multiple_option(dst_packet_data_pptr, &src_coap_msg_ptr->uri_path_ptr,
+             &src_coap_msg_ptr->uri_path_len, COAP_OPTION_URI_PATH, &previous_option_number);
 
     /* * * * Build Content-Type option * * * */
     if (src_coap_msg_ptr->content_format != COAP_CT_NONE) {
diff --git a/features/FEATURE_COMMON_PAL/mbed-coap/source/sn_coap_parser.c b/features/FEATURE_COMMON_PAL/mbed-coap/source/sn_coap_parser.c
index 6ec7c68de4..8f63f736d7 100644
--- a/features/FEATURE_COMMON_PAL/mbed-coap/source/sn_coap_parser.c
+++ b/features/FEATURE_COMMON_PAL/mbed-coap/source/sn_coap_parser.c
@@ -35,7 +35,6 @@
 #include "mbed-coap/sn_coap_protocol.h"
 #include "sn_coap_header_internal.h"
 #include "sn_coap_protocol_internal.h"
-
 /* * * * * * * * * * * * * * * * * * * * */
 /* * * * LOCAL FUNCTION PROTOTYPES * * * */
 /* * * * * * * * * * * * * * * * * * * * */
@@ -315,6 +314,7 @@ static int8_t sn_coap_parser_options_parse(struct coap_s *handle, uint8_t **pack
             (*packet_data_pptr) += 2;
         }
 
+        message_left = packet_len - (*packet_data_pptr - packet_data_start_ptr);
 
         /* * * Parse option itself * * */
         /* Some options are handled independently in own functions */
@@ -655,7 +655,7 @@ static int16_t sn_coap_parser_options_count_needed_memory_multiple_option(uint8_
     uint16_t i                      = 1;
 
     /* Loop all Uri-Query options */
-    while (i < packet_left_len) {
+    while (i <= packet_left_len) {
         if (option == COAP_OPTION_LOCATION_PATH && option_number_len > 255) {
             return -1;
         }
@@ -677,14 +677,13 @@ static int16_t sn_coap_parser_options_count_needed_memory_multiple_option(uint8_
 
         i += option_number_len;
         ret_value += option_number_len + 1; /* + 1 is for separator */
-        if(ret_value >= packet_left_len)
-            break;
 
-        if(ret_value >= packet_left_len)
-            break;
-
-        if( i == packet_left_len )
+        if( i == packet_left_len ) {
             break;
+        }
+        else if( i > packet_left_len ) {
+            return -1;
+        }
 
         if ((*(packet_data_ptr + i) >> COAP_OPTIONS_OPTION_NUMBER_SHIFT) != 0) {
             return (ret_value - 1);    /* -1 because last Part path does not include separator */
@@ -693,9 +692,19 @@ static int16_t sn_coap_parser_options_count_needed_memory_multiple_option(uint8_
         option_number_len = (*(packet_data_ptr + i) & 0x0F);
 
         if (option_number_len == 13) {
+
+            if(i + 1 >= packet_left_len) {
+                return -1;
+            }
+
             i++;
             option_number_len = *(packet_data_ptr + i) + 13;
         } else if (option_number_len == 14) {
+
+            if(i + 2 >= packet_left_len) {
+                return -1;
+            }
+
             option_number_len = *(packet_data_ptr + i + 2);
             option_number_len += (*(packet_data_ptr + i + 1) << 8) + 269;
             i += 2;
@@ -750,3 +759,4 @@ static int8_t sn_coap_parser_payload_parse(uint16_t packet_data_len, uint8_t *pa
     }
     return 0;
 }
+
diff --git a/features/FEATURE_COMMON_PAL/mbed-coap/source/sn_coap_protocol.c b/features/FEATURE_COMMON_PAL/mbed-coap/source/sn_coap_protocol.c
index 0612d16b25..2df34e3dd3 100644
--- a/features/FEATURE_COMMON_PAL/mbed-coap/source/sn_coap_protocol.c
+++ b/features/FEATURE_COMMON_PAL/mbed-coap/source/sn_coap_protocol.c
@@ -67,7 +67,7 @@ static int8_t                sn_coap_convert_block_size(uint16_t block_size);
 static sn_coap_hdr_s        *sn_coap_protocol_copy_header(struct coap_s *handle, sn_coap_hdr_s *source_header_ptr);
 #endif
 #if ENABLE_RESENDINGS
-static void                  sn_coap_protocol_linked_list_send_msg_store(struct coap_s *handle, sn_nsdl_addr_s *dst_addr_ptr, uint16_t send_packet_data_len, uint8_t *send_packet_data_ptr, uint32_t sending_time, void *param, uint8_t *uri_path_ptr, uint8_t uri_path_len);
+static uint8_t               sn_coap_protocol_linked_list_send_msg_store(struct coap_s *handle, sn_nsdl_addr_s *dst_addr_ptr, uint16_t send_packet_data_len, uint8_t *send_packet_data_ptr, uint32_t sending_time, void *param);
 static sn_nsdl_transmit_s   *sn_coap_protocol_linked_list_send_msg_search(struct coap_s *handle,sn_nsdl_addr_s *src_addr_ptr, uint16_t msg_id);
 static void                  sn_coap_protocol_linked_list_send_msg_remove(struct coap_s *handle, sn_nsdl_addr_s *src_addr_ptr, uint16_t msg_id);
 static coap_send_msg_s      *sn_coap_protocol_allocate_mem_for_msg(struct coap_s *handle, sn_nsdl_addr_s *dst_addr_ptr, uint16_t packet_data_len);
@@ -300,30 +300,9 @@ void sn_coap_protocol_clear_retransmission_buffer(struct coap_s *handle)
         return;
     }
     ns_list_foreach_safe(coap_send_msg_s, tmp, &handle->linked_list_resent_msgs) {
-        if (tmp->send_msg_ptr) {
-            if (tmp->send_msg_ptr->dst_addr_ptr) {
-                if (tmp->send_msg_ptr->dst_addr_ptr->addr_ptr) {
-                    handle->sn_coap_protocol_free(tmp->send_msg_ptr->dst_addr_ptr->addr_ptr);
-                    tmp->send_msg_ptr->dst_addr_ptr->addr_ptr = 0;
-                }
-                handle->sn_coap_protocol_free(tmp->send_msg_ptr->dst_addr_ptr);
-                tmp->send_msg_ptr->dst_addr_ptr = 0;
-            }
-            if (tmp->send_msg_ptr->packet_ptr) {
-                handle->sn_coap_protocol_free(tmp->send_msg_ptr->packet_ptr);
-                tmp->send_msg_ptr->packet_ptr = 0;
-            }
-            if (tmp->send_msg_ptr->uri_path_ptr) {
-                handle->sn_coap_protocol_free(tmp->send_msg_ptr->uri_path_ptr);
-                tmp->send_msg_ptr->uri_path_ptr = 0;
-            }
-            handle->sn_coap_protocol_free(tmp->send_msg_ptr);
-            tmp->send_msg_ptr = 0;
-        }
         ns_list_remove(&handle->linked_list_resent_msgs, tmp);
+        sn_coap_protocol_release_allocated_send_msg_mem(handle, tmp);
         --handle->count_resent_msgs;
-        handle->sn_coap_protocol_free(tmp);
-        tmp = 0;
     }
 #endif
 }
@@ -445,9 +424,11 @@ int16_t sn_coap_protocol_build(struct coap_s *handle, sn_nsdl_addr_s *dst_addr_p
     /* Check if built Message type was confirmable, only these messages are resent */
     if (src_coap_msg_ptr->msg_type == COAP_MSG_TYPE_CONFIRMABLE) {
         /* Store message to Linked list for resending purposes */
-        sn_coap_protocol_linked_list_send_msg_store(handle, dst_addr_ptr, byte_count_built, dst_packet_data_ptr,
+        if (sn_coap_protocol_linked_list_send_msg_store(handle, dst_addr_ptr, byte_count_built, dst_packet_data_ptr,
                 handle->system_time + (uint32_t)(handle->sn_coap_resending_intervall * RESPONSE_RANDOM_FACTOR),
-                param, src_coap_msg_ptr->uri_path_ptr, src_coap_msg_ptr->uri_path_len);
+                param) == 0) {
+            return -4;
+        }
     }
 
 #endif /* ENABLE_RESENDINGS */
@@ -702,15 +683,6 @@ sn_coap_hdr_s *sn_coap_protocol_parse(struct coap_s *handle, sn_nsdl_addr_s *src
             removed_msg_ptr = sn_coap_protocol_linked_list_send_msg_search(handle, src_addr_ptr, returned_dst_coap_msg_ptr->msg_id);
 
             if (removed_msg_ptr != NULL) {
-                if (returned_dst_coap_msg_ptr->msg_type == COAP_MSG_TYPE_RESET) {
-                    if(removed_msg_ptr->uri_path_len) {
-                        returned_dst_coap_msg_ptr->uri_path_ptr = handle->sn_coap_protocol_malloc(removed_msg_ptr->uri_path_len);
-                        if (returned_dst_coap_msg_ptr->uri_path_ptr != NULL) {
-                            memcpy(returned_dst_coap_msg_ptr->uri_path_ptr, removed_msg_ptr->uri_path_ptr, removed_msg_ptr->uri_path_len);
-                            returned_dst_coap_msg_ptr->uri_path_len = removed_msg_ptr->uri_path_len;
-                        }
-                    }
-                }
                 /* Remove resending message from active message resending Linked list */
                 sn_coap_protocol_linked_list_send_msg_remove(handle, src_addr_ptr, returned_dst_coap_msg_ptr->msg_id);
             }
@@ -799,7 +771,7 @@ int8_t sn_coap_protocol_exec(struct coap_s *handle, uint32_t current_time)
 #if ENABLE_RESENDINGS  /* If Message resending is not used at all, this part of code will not be compiled */
 
 /**************************************************************************//**
- * \fn static void sn_coap_protocol_linked_list_send_msg_store(sn_nsdl_addr_s *dst_addr_ptr, uint16_t send_packet_data_len, uint8_t *send_packet_data_ptr, uint32_t sending_time)
+ * \fn static uint8_t sn_coap_protocol_linked_list_send_msg_store(sn_nsdl_addr_s *dst_addr_ptr, uint16_t send_packet_data_len, uint8_t *send_packet_data_ptr, uint32_t sending_time)
  *
  * \brief Stores message to Linked list for sending purposes.
 
@@ -810,29 +782,33 @@ int8_t sn_coap_protocol_exec(struct coap_s *handle, uint32_t current_time)
  * \param *send_packet_data_ptr is Packet data to be stored
  *
  * \param sending_time is stored sending time
+ *
+ * \return 0 Allocation or buffer limit reached
+ *
+ * \return 1 Msg stored properly
  *****************************************************************************/
 
-static void sn_coap_protocol_linked_list_send_msg_store(struct coap_s *handle, sn_nsdl_addr_s *dst_addr_ptr, uint16_t send_packet_data_len,
-        uint8_t *send_packet_data_ptr, uint32_t sending_time, void *param, uint8_t *uri_path_ptr, uint8_t uri_path_len)
+static uint8_t sn_coap_protocol_linked_list_send_msg_store(struct coap_s *handle, sn_nsdl_addr_s *dst_addr_ptr, uint16_t send_packet_data_len,
+        uint8_t *send_packet_data_ptr, uint32_t sending_time, void *param)
 {
 
     coap_send_msg_s *stored_msg_ptr              = NULL;
 
     /* If both queue parameters are "0" or resending count is "0", then re-sending is disabled */
     if (((handle->sn_coap_resending_queue_msgs == 0) && (handle->sn_coap_resending_queue_bytes == 0)) || (handle->sn_coap_resending_count == 0)) {
-        return;
+        return 1;
     }
 
     if (handle->sn_coap_resending_queue_msgs > 0) {
         if (handle->count_resent_msgs >= handle->sn_coap_resending_queue_msgs) {
-            return;
+            return 0;
         }
     }
 
     /* Count resending queue size, if buffer size is defined */
     if (handle->sn_coap_resending_queue_bytes > 0) {
         if ((sn_coap_count_linked_list_size(&handle->linked_list_resent_msgs) + send_packet_data_len) > handle->sn_coap_resending_queue_bytes) {
-            return;
+            return 0;
         }
     }
 
@@ -840,7 +816,7 @@ static void sn_coap_protocol_linked_list_send_msg_store(struct coap_s *handle, s
     stored_msg_ptr = sn_coap_protocol_allocate_mem_for_msg(handle, dst_addr_ptr, send_packet_data_len);
 
     if (stored_msg_ptr == 0) {
-        return;
+        return 0;
     }
 
     /* Filling of coap_send_msg_s with initialization values */
@@ -861,19 +837,10 @@ static void sn_coap_protocol_linked_list_send_msg_store(struct coap_s *handle, s
     stored_msg_ptr->coap = handle;
     stored_msg_ptr->param = param;
 
-    if (uri_path_len) {
-        stored_msg_ptr->send_msg_ptr->uri_path_ptr = handle->sn_coap_protocol_malloc(uri_path_len);
-        if (stored_msg_ptr->send_msg_ptr->uri_path_ptr == NULL){
-            return;
-        }
-        stored_msg_ptr->send_msg_ptr->uri_path_len = uri_path_len;
-        memcpy(stored_msg_ptr->send_msg_ptr->uri_path_ptr, uri_path_ptr, uri_path_len);
-    }
-
-
     /* Storing Resending message to Linked list */
     ns_list_add_to_end(&handle->linked_list_resent_msgs, stored_msg_ptr);
     ++handle->count_resent_msgs;
+    return 1;
 }
 
 /**************************************************************************//**
@@ -1367,6 +1334,7 @@ static void sn_coap_protocol_linked_list_blockwise_remove_old_data(struct coap_s
  *
  * \param *dst_addr_ptr is pointer to destination address where message will be sent
  * \param packet_data_len is length of allocated Packet data
+ * \param uri_path_len is length of messages path url
  *
  * \return pointer to allocated struct
  *****************************************************************************/
@@ -1377,45 +1345,35 @@ coap_send_msg_s *sn_coap_protocol_allocate_mem_for_msg(struct coap_s *handle, sn
     coap_send_msg_s *msg_ptr = handle->sn_coap_protocol_malloc(sizeof(coap_send_msg_s));
 
     if (msg_ptr == NULL) {
-        return 0;
+        return NULL;
     }
 
+    //Locall structure for 1 malloc for send msg
+    struct
+    {
+        sn_nsdl_transmit_s transmit;
+        sn_nsdl_addr_s addr;
+        uint8_t trail_data[];
+    } *m;
+    int trail_size = dst_addr_ptr->addr_len + packet_data_len;
+
+    m = handle->sn_coap_protocol_malloc(sizeof *m + trail_size);
+    if (!m) {
+        handle->sn_coap_protocol_free(msg_ptr);
+        return NULL;
+    }
+    //Init data
+    memset(m, 0, sizeof(*m) + trail_size);
     memset(msg_ptr, 0, sizeof(coap_send_msg_s));
 
-    msg_ptr->send_msg_ptr = handle->sn_coap_protocol_malloc(sizeof(sn_nsdl_transmit_s));
+    msg_ptr->send_msg_ptr = &m->transmit;
+    msg_ptr->send_msg_ptr->dst_addr_ptr = &m->addr;
 
-    if (msg_ptr->send_msg_ptr == NULL) {
-        sn_coap_protocol_release_allocated_send_msg_mem(handle, msg_ptr);
-        return 0;
+    msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr = m->trail_data;
+    if (packet_data_len) {
+        msg_ptr->send_msg_ptr->packet_ptr = m->trail_data + dst_addr_ptr->addr_len;
     }
 
-    memset(msg_ptr->send_msg_ptr, 0 , sizeof(sn_nsdl_transmit_s));
-
-    msg_ptr->send_msg_ptr->dst_addr_ptr = handle->sn_coap_protocol_malloc(sizeof(sn_nsdl_addr_s));
-
-    if (msg_ptr->send_msg_ptr->dst_addr_ptr == NULL) {
-        sn_coap_protocol_release_allocated_send_msg_mem(handle, msg_ptr);
-        return 0;
-    }
-
-    memset(msg_ptr->send_msg_ptr->dst_addr_ptr, 0, sizeof(sn_nsdl_addr_s));
-
-    msg_ptr->send_msg_ptr->packet_ptr = handle->sn_coap_protocol_malloc(packet_data_len);
-
-    if (msg_ptr->send_msg_ptr->packet_ptr == NULL) {
-        sn_coap_protocol_release_allocated_send_msg_mem(handle, msg_ptr);
-        return 0;
-    }
-
-    msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr = handle->sn_coap_protocol_malloc(dst_addr_ptr->addr_len);
-
-    if (msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr == NULL) {
-        sn_coap_protocol_release_allocated_send_msg_mem(handle, msg_ptr);
-        return 0;
-    }
-
-    memset(msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr, 0, dst_addr_ptr->addr_len);
-
     return msg_ptr;
 }
 
@@ -1431,33 +1389,10 @@ coap_send_msg_s *sn_coap_protocol_allocate_mem_for_msg(struct coap_s *handle, sn
 static void sn_coap_protocol_release_allocated_send_msg_mem(struct coap_s *handle, coap_send_msg_s *freed_send_msg_ptr)
 {
     if (freed_send_msg_ptr != NULL) {
-        if (freed_send_msg_ptr->send_msg_ptr != NULL) {
-            if (freed_send_msg_ptr->send_msg_ptr->dst_addr_ptr != NULL) {
-                if (freed_send_msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr != NULL) {
-                    handle->sn_coap_protocol_free(freed_send_msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr);
-                    freed_send_msg_ptr->send_msg_ptr->dst_addr_ptr->addr_ptr = 0;
-                }
-
-                handle->sn_coap_protocol_free(freed_send_msg_ptr->send_msg_ptr->dst_addr_ptr);
-                freed_send_msg_ptr->send_msg_ptr->dst_addr_ptr = 0;
-            }
-
-            if (freed_send_msg_ptr->send_msg_ptr->packet_ptr != NULL) {
-                handle->sn_coap_protocol_free(freed_send_msg_ptr->send_msg_ptr->packet_ptr);
-                freed_send_msg_ptr->send_msg_ptr->packet_ptr = 0;
-            }
-
-            if (freed_send_msg_ptr->send_msg_ptr->uri_path_ptr != NULL) {
-                handle->sn_coap_protocol_free(freed_send_msg_ptr->send_msg_ptr->uri_path_ptr);
-                freed_send_msg_ptr->send_msg_ptr->uri_path_ptr = 0;
-            }
-
-            handle->sn_coap_protocol_free(freed_send_msg_ptr->send_msg_ptr);
-            freed_send_msg_ptr->send_msg_ptr = 0;
-        }
-
+        handle->sn_coap_protocol_free(freed_send_msg_ptr->send_msg_ptr);
+        freed_send_msg_ptr->send_msg_ptr = NULL;
         handle->sn_coap_protocol_free(freed_send_msg_ptr);
-        freed_send_msg_ptr = 0;
+        freed_send_msg_ptr = NULL;
     }
 }
 
@@ -1877,7 +1812,7 @@ static sn_coap_hdr_s *sn_coap_handle_blockwise_message(struct coap_s *handle, sn
                 sn_coap_protocol_linked_list_send_msg_store(handle, src_addr_ptr,
                         dst_packed_data_needed_mem,
                         dst_ack_packet_data_ptr,
-                        handle->system_time + (uint32_t)(handle->sn_coap_resending_intervall * RESPONSE_RANDOM_FACTOR), param, NULL, 0);
+                        handle->system_time + (uint32_t)(handle->sn_coap_resending_intervall * RESPONSE_RANDOM_FACTOR), param);
 #endif
                 handle->sn_coap_protocol_free(dst_ack_packet_data_ptr);
                 dst_ack_packet_data_ptr = 0;