trace: _callback_lock(): callback.c, 130:
9:callback:lock: locked (LIB,SESSION_INIT)
trace: snmp_call_callbacks(): callback.c, 322:
callback: START calling callbacks for maj=0 min=5
trace: snmp_call_callbacks(): callback.c, 336:
callback: calling a callback for maj=0 min=5
trace: snmp_call_callbacks(): callback.c, 348:
callback: END calling callbacks for maj=0 min=5 (1 called)
trace: _callback_unlock(): callback.c, 164:
9:callback:lock: unlocked (LIB,SESSION_INIT)
trace: _sess_async_send(): snmp_api.c, 5067:
sess_async_send: encoding failure
trace: snmp_sess_select_info2(): snmp_api.c, 6188:
sess_select: for all sessions: 4 
sess_select: blocking:no session requests or alarms.