CCS/MSP430FR5969: code suddenly compile error

Tool/software: Code Composer Studio

The code  worked well before. Suddenly when i complie it, the code starts to report errors. Below is the error. It seems that it could not  find the file, however, the file is just under the same path. I don't why. 
Please help me.Thank you very much.

my code is load from the example code, and below is my code:

/* --COPYRIGHT--,BSD
 * Copyright (c) 2017, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * --/COPYRIGHT--*/
//******************************************************************************
//! TIMER_A, Toggle P1.0, Overflow ISR, 32kHz ACLK
//!
//! Description: Toggle P1.0 using software and the TIMER_A overflow ISR.
//! In this example an ISR triggers when TB overflows. Inside the ISR P1.0
//! is toggled. Toggle rate is exactly 0.25Hz = [32kHz/FFFFh]/2. Proper use of the
//! TAIV interrupt vector generator is demonstrated.
//! ACLK = TBCLK = 32kHz, MCLK = SMCLK = default DCO ~ 1.045MHz
//!
//! Tested On: MSP430FR5969
//!         ---------------
//!     /|\|               |
//!      | |               |
//!      --|RST            |
//!        |               |
//!        |           P1.0|-->LED
//!
//! This example uses the following peripherals and I/O signals.  You must
//! review these and change as needed for your own board:
//! - Timer peripheral
//! - GPIO peripheral
//!
//! This example uses the following interrupt handlers.  To use this example
//! in your own application you must add these interrupt handlers to your
//! vector table.
//! - TIMER_A7
//!
//
//*****************************************************************************
#include "driverlib.h"

void main (void)
{
    //Stop WDT
    WDT_A_hold(WDT_A_BASE);

    //Set P1.0 to output direction
    GPIO_setAsOutputPin(
        GPIO_PORT_P1,
        GPIO_PIN0
        );

    /*
     * Disable the GPIO power-on default high-impedance mode to activate
     * previously configured port settings
     */
    PMM_unlockLPM5();

    //Start timer in continuous mode sourced by ACLK
	Timer_A_clearTimerInterrupt(TIMER_A1_BASE);

    Timer_A_initContinuousModeParam param = {0};
    param.clockSource = TIMER_A_CLOCKSOURCE_SMCLK;
    param.clockSourceDivider = TIMER_A_CLOCKSOURCE_DIVIDER_1;
    param.timerInterruptEnable_TAIE = TIMER_A_TAIE_INTERRUPT_ENABLE;
    param.timerClear = TIMER_A_DO_CLEAR;
    param.startTimer = false;
    Timer_A_initContinuousMode(TIMER_A1_BASE, &param);

    Timer_A_startCounter(TIMER_A1_BASE,
        TIMER_A_CONTINUOUS_MODE
        );

    //Enter LPM0, enable interrupts
    __bis_SR_register(LPM0_bits + GIE);

    //For debugger
    __no_operation();
}

//******************************************************************************
//
//This is the TIMER1_A3 interrupt vector service routine.
//
//******************************************************************************
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=TIMER1_A1_VECTOR
__interrupt
#elif defined(__GNUC__)
__attribute__((interrupt(TIMER1_A1_VECTOR)))
#endif
void TIMER1_A1_ISR (void)
{
    //Any access, read or write, of the TAIV register automatically resets the
    //highest "pending" interrupt flag
    switch ( __even_in_range(TA1IV,14) ){        //只能与switch 语句结合使用，判断value 是否为偶数且小于等于upper_limit.在判断多中断源的中断的来源时可以使用此函数
        case  0: break;                          //No interrupt
        case  2: break;                          //CCR1 not used
        case  4: break;                          //CCR2 not used
        case  6: break;                          //CCR3 not used
        case  8: break;                          //CCR4 not used
        case 10: break;                          //CCR5 not used
        case 12: break;                          //CCR6 not used
        case 14:
            //Toggle P1.0                    // overflow
            GPIO_toggleOutputOnPin(
                GPIO_PORT_P1,
                GPIO_PIN0
            );
            break;
        default: break;
    }
}