Why is my CAN module used incorrectly

#include <stdio.h>
#include <string.h>
#include "cmsis_os.h"
 
#include "Driver_CAN.h"
 
// CAN Driver Controller selector
#define  CAN_CONTROLLER         1       // CAN Controller number
 
#define _CAN_Driver_(n)         Driver_CAN##n
#define  CAN_Driver_(n)        _CAN_Driver_(n)
extern   ARM_DRIVER_CAN         CAN_Driver_(CAN_CONTROLLER);
#define  ptrCAN               (&CAN_Driver_(CAN_CONTROLLER))
 
uint32_t                        rx_obj_idx  = 0xFFFFFFFFU;
uint8_t                         rx_data[8];
ARM_CAN_MSG_INFO                rx_msg_info;
uint32_t                        tx_obj_idx  = 0xFFFFFFFFU;
uint8_t                         tx_data[8];
ARM_CAN_MSG_INFO                tx_msg_info;
 
static void Error_Handler (void) { while (1);}
 
void CAN_SignalUnitEvent (uint32_t event) {}
 
void CAN_SignalObjectEvent (uint32_t obj_idx, uint32_t event) {
 
  if (obj_idx == rx_obj_idx) {                  // If receive object event
    if (event == ARM_CAN_EVENT_RECEIVE) {       // If message was received successfully
      if (ptrCAN->MessageRead(rx_obj_idx, &rx_msg_info, rx_data, 8U) > 0U) {
                                                // Read received message
        // process received message ...
      }
    }
  }
  if (obj_idx == tx_obj_idx) {                  // If transmit object event
    if (event == ARM_CAN_EVENT_SEND_COMPLETE) { // If message was sent successfully
      // acknowledge sent message ...
    }
  }
}
 
int main (void) {
	uint8_t data_buf[8];
  ARM_CAN_CAPABILITIES     can_cap;
  ARM_CAN_OBJ_CAPABILITIES can_obj_cap;
  int32_t                  status;
  uint32_t                 i, num_objects;
 
  can_cap = ptrCAN->GetCapabilities (); // Get CAN driver capabilities
  num_objects = can_cap.num_objects;    // Number of receive/transmit objects
 
  status = ptrCAN->Initialize    (CAN_SignalUnitEvent, CAN_SignalObjectEvent);  // Initialize CAN driver
  if (status != ARM_DRIVER_OK ) { Error_Handler(); }
 
  status = ptrCAN->PowerControl  (ARM_POWER_FULL);                              // Power-up CAN controller
  if (status != ARM_DRIVER_OK ) { Error_Handler(); }
 
  status = ptrCAN->SetMode       (ARM_CAN_MODE_INITIALIZATION);                 // Activate initialization mode
  if (status != ARM_DRIVER_OK ) { Error_Handler(); }

  status = ptrCAN->SetBitrate    (ARM_CAN_BITRATE_NOMINAL,              // Set FD bitrate
                                  10000U,                               // Set bitrate to 100 kbit/s
                                  ARM_CAN_BIT_PROP_SEG(5U)   |          // Set propagation segment to 5 time quanta
                                  ARM_CAN_BIT_PHASE_SEG1(1U) |          // Set phase segment 1 to 1 time quantum (sample point at 87.5% of bit time)
                                  ARM_CAN_BIT_PHASE_SEG2(1U) |          // Set phase segment 2 to 1 time quantum (total bit is 8 time quanta long)
                                  ARM_CAN_BIT_SJW(1U));                 // Resynchronization jump width is same as phase segment 2

  if (status != ARM_DRIVER_OK ) { Error_Handler(); }
 
  for (i = 0U; i < num_objects; i++) {                                          // Find first available object for receive and transmit
    can_obj_cap = ptrCAN->ObjectGetCapabilities (i);                            // Get object capabilities
    if      ((rx_obj_idx == 0xFFFFFFFFU) && (can_obj_cap.rx == 1U)) { rx_obj_idx = i; }
    else if ((tx_obj_idx == 0xFFFFFFFFU) && (can_obj_cap.tx == 1U)) { tx_obj_idx = i; break; }
  }
  if ((rx_obj_idx == 0xFFFFFFFFU) || (tx_obj_idx == 0xFFFFFFFFU)) { Error_Handler(); }
 
  // Set filter to receive messages with extended ID 0x12345678 to receive object
  status = ptrCAN->ObjectSetFilter(rx_obj_idx, ARM_CAN_FILTER_ID_EXACT_ADD, ARM_CAN_EXTENDED_ID(0x12345678U), 0U);
  if (status != ARM_DRIVER_OK ) { Error_Handler(); }
 
  status = ptrCAN->ObjectConfigure(tx_obj_idx, ARM_CAN_OBJ_TX);                 // Configure transmit object
  if (status != ARM_DRIVER_OK ) { Error_Handler(); }
 
  status = ptrCAN->ObjectConfigure(rx_obj_idx, ARM_CAN_OBJ_RX);                 // Configure receive object
  if (status != ARM_DRIVER_OK ) { Error_Handler(); }
	
	status = ptrCAN->Control( ARM_CAN_CONTROL_RETRANSMISSION,0);
	if (status != ARM_DRIVER_OK ) { Error_Handler(); }
	
  status = ptrCAN->SetMode (ARM_CAN_MODE_NORMAL);                               // Activate normal operation mode
  if (status != ARM_DRIVER_OK ) { Error_Handler(); }
	
	
	memset(&tx_msg_info, 0, sizeof(ARM_CAN_MSG_INFO));            // Clear transmit message structure
	tx_msg_info.id  = ARM_CAN_EXTENDED_ID(0x02345678U);           // Set ID of message
	tx_msg_info.dlc = 8;
	data_buf[0] = '1';  data_buf[1] = '2';                        // Prepare data to transmit
	data_buf[2] = '3';  data_buf[3] = '4';
	data_buf[4] = '5';  data_buf[5] = '6';
	data_buf[6] = '7';  data_buf[7] = '8';
  
  while (1) {
		if(ptrCAN->GetStatus().unit_state == 1 )
		{
			ptrCAN->MessageSend(tx_obj_idx, &tx_msg_info, data_buf, 8);    // Send message
			if (status != ARM_DRIVER_OK ) { Error_Handler(); }
	  }	
  }
}