[Mod-security-rules] mod sec rule to execute lua script

[kinomakino <kin...@ho...>]

As always, thanks for the help. 
I'm playing with a lua script from mod security (exec:
/var/scripts/script.lua) 
the target is ip ban in iptables source that triggers the rule. 

I get receive the REMOTE_ADDR variable, but I mod_sec alert appears: 
Message: Lua: Script execution failed: attempt to call a nil value 

The variable takes the script, because to write a test log. 
The lua script is as follows: 
Local remote_addr = m.getvar ("REMOTE_ADDR"); 
Local log_file = "/tmp/lua_tmp.log" 
file = io.open (log_file, "a") 
file: write (remote_addr) 
file: write ("\ n") 
file: close () 
print ("0") 

you have information about this error? 
Thank you !!!