MiniCom-- Error Lock Failed

[Maximus]

I want to use the usb port as a serial port.

So, i  have used a Serial Gadget Driver on the Device Side.


The Device is connected to the Host.

On Host Side, I want to run minicom.

The Driver has been loaded on host side.


I have set the Port --> /dev/input/ttyACM0 and the file exists.

I can use cat on /dev/input/ttyACM0 and at the other side i get
whatever i have input using the cat command.


But, minicom is NOT working ?. i get the error when i lauch minicom.

[root@LocalSystem ]# minicom
Device /dev/input/ttyACM0 lock failed: No such file or directory.


What is the error ?.
Why does this error occur ?.


How to prevent this error ?.


Regards,
Max