[rules-users] help! the field *** is not visible

[John Peterson]

Try adding 'dialect "mvel"' (no single quotes) after the rule name to the top of each of the rules.  I have seen this error before and doing this resolved the issue.

>hello,everyone!I wrote a rule with Drools,but the error told me that the field Server.Message is not visible, I can't find how it happens. Please 
>help me, I am almost exhausted with it. thank you.
>the rules are as follows:
> 
>package com.sample
>import com.sample.Server;
> 
>rule "system will execute 'tc' command"
> when
>    eval(Server.Message>8388608)
> then 
>     System.out.println("The network is so crowd that it needs repairing.");
>  Runtime.getRuntime().exec("tc");#execute the "tc" command end
> 
>rule "caution"
>    when 
>        eval(Server.Message==8388608)
>    then 
>        System.out.println("caution!The network maybe will get blocked very soon."); end 
> 
>rule "fluent network"
>  when
>  eval(Server.Message<8388608)#conditions
> then
>  System.out.println("the current network is very good");
>  #actions 
>end