hi,

I am tesing nxlog on Ubuntu 16.04 LTS with the configuration

<Extension fileop>
        Module xm_fileop
</Extension>

<Input udpin>
        Module im_udp
        Host 127.0.0.1
        Port 1514
        Exec $HOSTIP = string(host_ip());
        Exec file_write("/tmp/debug.txt", "HostIP:" + $HOSTIP);
</Input>

<Output udpfile>
        Module om_file
        File "/var/log/udp.log"
</Output>

<Route udp>
    Path udpin => udpfile
</Route>

and  I generated log using linux command nc -u 127.0.0.1 1514 and can not get IP in /tmp/debug.txt.

1. I have reinstall the Ubuntu 16.04 LTS purely and install the deb file from nxlog.co， and it still does not get the IP address 

2. I install the nxlog from source code, and it still does not get the IP address

3. I test the same configuration on CentOS7, CentOS6, Ubuntu 14.04 LTS. It works correctly.

so， is there someting that does not compatible with the Ubuntu 16.04 LTS?