Errorcode 13313 at sd_ble_gatts_hvx()

Question

Hello,
I would like to send an int32 value every 500ms and use for this the same procedure as it is shown in the heart-rate-example. The code for sending is: 
 // Send value if connected and notifying

if ((p_ad->conn_handle != BLE_CONN_HANDLE_INVALID) 
&& (p_ad->is_notification_supported))

 {
 uint8_t encoded_adValue[10];
 uint16_t hvx_len;
 ble_gatts_hvx_params_t hvx_params;

 hvx_len = uint32_encode(SActualValue.i32Value, encoded_adValue);

 memset(&hvx_params, 0, sizeof(hvx_params));

 hvx_params.handle = p_ad->ad_actualValue_handles.value_handle;
 hvx_params.type = BLE_GATT_HVX_NOTIFICATION;
 hvx_params.offset = 0;
 hvx_params.p_len = &hvx_len;
 hvx_params.p_data = encoded_adValue;

 err_code = sd_ble_gatts_hvx(p_ad->conn_handle, &hvx_params);
 if (err_code == NRF_SUCCESS)
 {
 err_code = NRF_ERROR_DATA_SIZE;
 }
 }
 else
 {
 err_code = NRF_ERROR_INVALID_STATE;
 }

 return err_code;
 
 I suppose having initialized correctly everything (also in services_init()); looking at this forum I tried already the inclusion of 
 case BLE_GATTS_EVT_SYS_ATTR_MISSING:
 err_code = sd_ble_gatts_sys_attr_set(p_ble_evt->evt.gatts_evt.conn_handle, NULL, 0, 0);
 APP_ERROR_CHECK(err_code);
 break;
 
 in the function on_ble_event() but when debugging with a breakpoint I see that this part of code is never reached...
What can I do next?

matthk · Accepted Answer

Hello Petter,
sorry for my late reply - I was on a business travel. 
 What I wanted to say is that I was looking at the forum before posting my problem - I found at the post devzone.nordicsemi.com/.../ 
the information that the mentioned error code comes from a missing value for the CCCD: In this post a collegue of you recommended as one possible action to use the following code lines
case BLE_GATTS_EVT_SYS_ATTR_MISSING:
err_code = sd_ble_gatts_sys_attr_set(p_ble_evt->evt.gatts_evt.conn_handle, NULL, 0, 0);
APP_ERROR_CHECK(err_code);
break;
which I have implemented in my code (in switch/case in function on_ble_evt()), but setting a breakpoint on that showed me that this code is never reached and by that can not help solve the problem...
In the meantime I made some changes and now it works:
One of the changes was to give more RAM to the S132 BLE stack; also some handles had to be changed.
Finally I can't say any more which detail brought the solutions, but now it works!
Thanks a lot!