ORBIT-USER: unable to set tx_power

[Kanchan Devarakonda]

Hi,

I am trying to write an experiment involving changing transmit power 
for the wireless card. Towards this end, I started off by adding the 
following line to hello world script (as mentioned in FAQ):

node.net.w0.tx_power = 0

But when I run this script, I see the following warning:

WARN net/w0: Unrecognized path 'net/w0/tx_power='

Does this mean that "tx_power" is not valid? I should add I am a ruby 
newbie. 

Also, there are two prototypes provided as part of hello world example. 
Are there any other prototypes available for use? 

Is there any way to search the mailing list (are they archived 
somewhere?)

Thanks,
Kanchan