open3: exec of /usr/sbin/ipset flush failed at /usr/sbin/csf line 4770

[donsony]

My CSF is stopped. When I try to start it, it gives this message (It was working fine till yesterday. I did some settings changes as recommended by Server Security option. After that it wont start

Starting csf...

Flushing chain `INPUT'
Flushing chain `FORWARD'
Flushing chain `OUTPUT'
Flushing chain `PREROUTING'
Flushing chain `POSTROUTING'
Flushing chain `OUTPUT'
Flushing chain `INPUT'
Flushing chain `FORWARD'
Flushing chain `OUTPUT'
open3: exec of /usr/sbin/ipset flush failed at /usr/sbin/csf line 4770.
...Done.

[donsony]

I found the issue which was caused by enabling LF_IPSET, but not installing ipset.

Went to Software>>Install and RPM and installed ipset, problem solved.