Cannot read value using GPMEM over IPC on nrf7002DK

Question

Hello, 
 I made a firmware that uses the IPC from the net core to the app core on the nrf700DK board. 
 I can read the events that generate callback on the receiver core (app core). I want to pass a value from the net to the app core using GPMEM. 
 I have attached the code: 
 net core: 
 int main(void)
{
	#if defined(__ZEPHYR__)
 IRQ_CONNECT(NRFX_IRQ_NUMBER_GET(NRF_TIMER_INST_GET(TIMER_INST_IDX)), IRQ_PRIO_LOWEST, NRFX_TIMER_INST_HANDLER_GET(TIMER_INST_IDX), 0, 0);
	IRQ_CONNECT(NRFX_IRQ_NUMBER_GET(NRF_SPIS_INST_GET(SPIS_INST_IDX)), IRQ_PRIO_LOWEST,NRFX_SPIS_INST_HANDLER_GET(SPIS_INST_IDX), 0, 0);
	//IRQ_CONNECT(NRFX_IRQ_NUMBER_GET(NRF_IPC_CHANNEL_0),IRQ_PRIO_LOWEST,ipc_event_handler,0,0);
	IRQ_CONNECT(IPC_IRQn, 1, nrfx_ipc_irq_handler, 0, 0);
	#endif
	nrfx_err_t err;

init_hfclk();
	init_gpio();
	init_timer();
	init_spis();

err = nrfx_ipc_init(1, (nrfx_ipc_handler_t)ipc_event_handler, NULL);
	nrfx_ipc_send_task_channel_assign(IPC_EVENT_ID_0, IPC_CHANNEL_ID_0);
	
	while(1)
	{
 if(flag)
 {
 nrfx_ipc_gpmem_set(0,mem);
 mem_value = NRF_IPC->GPMEM[0];
 nrf_gpio_pin_toggle(LED);
 flag = false;
 }
 
	}
	return 0;
}

static void spis_handler(nrfx_spis_evt_t const * p_event, void * p_context)
{
 if (p_event->evt_type == NRFX_SPIS_XFER_DONE)
 {
 switch (cmd_spi_rx_buf_slave[0])
 {
 case 0xE1:
 nrfx_ipc_signal(IPC_EVENT_ID_0); 
 flag = true;
 break;

default:
 break;
 }
 nrfx_spis_buffers_set(&spis_inst, NULL, 0, cmd_spi_rx_buf_slave, sizeof(cmd_spi_rx_buf_slave));
 }
} 
 Using the debug I can see that the mem_value is equal to the value set using nrfx_ipc_gpmem_set() 
 app core: 
 int main(void)
{
	#if defined(__ZEPHYR__)
	IRQ_CONNECT(IPC_IRQn, 1, nrfx_ipc_irq_handler, 0, 0);
	#endif

nrfx_err_t err;

init_gpio();

err = nrfx_ipc_init(1, (nrfx_ipc_handler_t)ipc_event_handler, NULL);
	nrfx_ipc_receive_event_channel_assign(IPC_EVENT_ID_0, IPC_CHANNEL_ID_0);
	nrfx_ipc_receive_event_enable(IPC_EVENT_ID_0);

while(1)
	{
 if(ipc_rcv)
 {
 data = nrfx_ipc_gpmem_get(0);
 if(data == 0xE1)
 {
 nrf_gpio_pin_toggle(LED);
 }
 ipc_rcv = false;
 }
	}

return 0;
}

void ipc_event_handler(uint32_t event_mask, void * p_context)
{
	if(event_mask == IPC_EVENT_ID_0)
	{
 ipc_rcv = true;
	}
} 
 Using the debugger in the net core I see the value of GPMEM[0] equal to 0 
 
 The proj.conf file are: 
 net core: 
 CONFIG_GPIO=y
CONFIG_NRFX_TIMER0=y
CONFIG_LOG=n
CONFIG_SERIAL=n
CONFIG_NRFX_SPIS0=y
CONFIG_NRFX_IPC=y


CONFIG_MAIN_STACK_SIZE=4096 
 
 app core: 
 CONFIG_GPIO=y
#CONFIG_IPC_SERVICE=y
CONFIG_BOARD_ENABLE_CPUNET=y
CONFIG_NRFX_IPC=y

How can I pass data between cores? 
 
 Thanks