BLE_API setLinkSecurity does not work.

[nekosh]

I tried to pairing with peripheral device from central mbed device.
I tried is below
ble.securityManager().init(allowbonding =true, requireMITM =false, iccaps=0)
->OK,

ble.securityManager().setLinkSecurity(handle,SECURITY_MODE_ENCRYPTION_NO_MITM) from initializedCallback.
->becomes ERRROR(unspecified)
Does anyone succeed in pairing form central device?

NOTE:
I used ble nano for central device.

[ciarmcom]

ARM Internal Ref: IOTSFW-2565