ERR in using SWD_DIO pin to gpio pin

[ETSZ]

I want to use SWD_DIO pin to PTA4. 

but when i debug, if code go through this code, debugger shows me 'no source available for "__isr_vector() 0x4"'

and debug stops.

why this problem happen? datasheet says SWD_DIO pin is 'Serial Wire Debug Data input/output', so debug process can't go more?

[ErichStyger · Accepted solution]

Yes, if you map a pin used by SWD/Debug as a GPIO pin, you won't be able to debug any more.