S130 can't be a central and Peripheral at the same time

[Songplus]

As a peripheral,S130 can work ok,but when I add a central role, there is a error at central start to connect a peripheral.err_code = sd_ble_gap_connect(&addr,&m_scan_param,&m_connection_param); APP_ERROR_CHECK(err_code);here,err_code=0x00000005,the return value is out of the legal returns.I don't know what happen. whether is the m_scan_param or the m_connection_param value wrong?

[endnode]

The headline is incorrect. The S130 indeed can handle both GAP Central and Peripheral roles at the same time and several nRF5 SDK examples show it. It's your FW which is buggy.

From very little you shared it's impossible to help you. Please identify which exact HW do you use, which SD version, which nRF5/nRF51 SDK version, what example project you started from and also go back in your project history to be as close as possible to the example (ideally to the moment when all major features worked as expected). Then we can do something together. Otherwise your question is as effective as screaming from the window.

[endnode]

"But in the example,before modify,the program can't work stability." what do you mean by that???? The examples indeed work in multi-role without problems. Could you show some BLE sniffer trace where it breaks and doesn't release some role (whatever that means)?