Openvox A1200p [ERROR: Module opvxa1200 is in use]

[root@MiWiFi-R3-srv asterisk]# service dahdi restart
Unloading DAHDI hardware modules: ERROR: Module opvxa1200 is in use
ERROR: Module dahdi_echocan_mg2 is in use
ERROR: Module dahdi is in use by dahdi_echocan_mg2,opvxa1200
error
Loading DAHDI hardware modules:
opvxa1200: [ OK ]

D: auto '/sys/bus/dahdi_devices/devices/pci:0000:03:06.0'
auto-assign /sys/bus/dahdi_devices/devices/pci:0000:03:06.0
Running dahdi_cfg: [ OK ]
[root@MiWiFi-R3-srv asterisk]#

Hello Sir,

In this case please stop your asterisk first , then try to restart dahdi.