LAUNCHXL-CC3235SF:  Memory map prevented reading 0xFFFFAC26

I have the following code to retrieve a message from a POSIX queue.

After the mq_retrieve function I try to access the message values and it runs into a Hwi with a LOOP FOREVER

Same type of code is in other projects and it works.

Not sure if this is bad coding and I'm missing something or if there is any configuration that I need to fix. 

thanks in advance for any help

typedef uint16_t Signal; 

enum mySignals {
    START_SIG,
    STOP_SIG,
};

typedef struct {
    Signal sig; 
} Message;

then I have this code inside  a function that retreives the message from the queue

int32_t ret;
Message *m;

ret = mq_receive(queue, (char*)&m, sizeof(Message), NULL);

switch (m->sig) { // Here breaks
    case START_SIG: 
    {
        //do something
        break;
    }
    
    case STOP_SIG: {
        //do something
        break;
    }
    default: {
        break
    }

here is where it ends up:  spin here indefinitely

ti_sysbios_family_arm_m3_Hwi_excHandlerAsm__I:
        .asmfunc
        tst     lr, #4          ; context on PSP?
        ite     NE
        mrsne   r0, psp         ; if yes, then use PSP
        moveq   r0, sp          ; else use MSP

        mov     sp, r0          ; use this stack
        stmfd   sp!, {r4-r11}   ; save r4-r11 while we're at it
        mov     r0, sp          ; pass sp to exception handler
        mov     r1, lr          ; pass lr too
        mov     r4, lr          ; preserve LR in r4

        ldr     r2, excHandlerAddr
        blx     r2

        mov     r0, sp          ; for ROV
        mov     r1, r4          ; for ROV
$1
        b       $1              ; spin here indefinitely