MSP430程序调试时出现No source available for "0xfffe"

#include
void main(void)
{
WDTCTL=WDTPW+WDTHOLD;
P1DIR |=BIT0;
TA0CCTL0=CCIE;
TA0CCR0=50000;
TA1CCTL0=CCIE;
TA1CCR0=500000;
TA0CTL=TASSEL_2+MC_2+TACLR;
TA1CTL=TASSEL_2+MC_2+TACLR;
__bis_SR_register(LPM0_bits+GIE);
}
#pragma vector=TIMER0_A0_VECTOR
__interrupt void TIMER0_A0_ISR(void)
{
if(!(P1OUT&BIT1)) P1OUT &=~BIT0;
else P1OUT ^=BIT0;
}
#pragma vector=TIMER0_A1_VECTOR
__interrupt void TIMER0_A1_ISR(void)
{
P1OUT ^=BIT1;
}