MSP430FR6989: writing to memory

Part Number: MSP430FR6989

Dear, 

This thread follows on a first one (https://e2e.ti.com/support/microcontrollers/msp430/f/166/t/931471) however with a different problem. 

I am unable to write to memory (but I can read from it). 

The code is: 

#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=PORT3_VECTOR
__interrupt void Port_3(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(PORT3_VECTOR))) Port_3 (void)
#else
#error Compiler not supported!
#endif
{
    /*
     * 4 usable RAM sections:
     * 1. D --> 1800h 'till 187Fh
     * 2. C --> 1880h 'till 18FFh
     * 3. B --> 1900h 'till 187Fh
     * 4. A --> 1980h 'till 19FFh
     */
    uint16_t volatile * address = (uint16_t *) getAddress();

        //READ

        if(!(P3IN & BIT0)){  // READ
            P2DIR &= 0x00;  // put in read mode
            *address = P2IN; // --> FAULT HERE NOT ABLE TO WRITE TO MEMORY
            P3OUT |= BIT2;
        }
        //WRITE
        else{
            P2DIR |= 0xFF;  // put in write mode
            P2OUT &= 0x00;
            P2OUT |= *address;
            P3OUT |= BIT2;  // set ACK to 1
            P4DIR |= BIT0;
            P4OUT |= BIT0;
        }

    while(!(P3IN & BIT1)){ // do nothing while Trigger (3.1) is still high
        __no_operation();
    }

    P2DIR &= 0x00;
    P3OUT = ~BIT2;

    P3IFG=0; // set all flags to 0

}

Where I wanted to write to the above mentioned (in the code) sections. The address is correct (as I am able to read those, and is also checked via debugger). However I am unable to write to it (If you want to know how I tested it, I refer to the above mentioned thread where it is explained, but rest assured it is tested multiple ways). 

In the settings I have enabled (in properties --> CCS General --> MPU) the "manually specify memory.." and put the info memory on R and W.