I debug with a serial sample code with MC9S12ZVCA96MLF, when I have code like:
```C
#if SCI_MODULE == SCI1
interrupt VectorNumber_Vsci1 void SCIISR(void)
#endif /* SCI_MODULE == SCI1 */
{
// if the RDRF OR the OR flag is set
if (SCISR1 & (SCISR1_RDRF_MASK + SCISR1_OR_MASK))
RxISR(); //go get a character & place it in the buffer
//if transmit interrupts are enable AND the TDRE flag is set
if ((SCICR2 & SCICR2_TIE_MASK) && (SCISR1 & SCISR1_TDRE_MASK))
TxISR(); //go send a character to the host
}
```
and after I start debug with flash, I always get error like below:

what's wrong with this.