How I solve the problem in keil5 "*** error 65: access violation at 0xFFFFFFF4 : no 'write' permission"?

[fl.Wang]

when I used simulator in keil5 for NRF51 software debug, there is a problem : *** error 65: access violation at 0xFFFFFFF4 : no 'write' permission. When I used the keil5 command "Map 0xFFFF0000,0xFFFFFFFF READ WRITE", the error disappeared. But, the "PC(Program Counter)" was always in 0x00000000 and the software was not running at all. Can you help me? Thank you so much.

[Hung Bui]

I don't think the simulator works with our code. You may want to get hold of a nRF5 DK for development. Please be aware that latest softdevice for nRF51 is S130 v2.0. And nRF52 is suggested for new product development.