R help - Jan 2008 - Why I cannot get the intervals from "Rails" data ?

Dear R users,
I would like to know where I'm wrong doing the following.

lmList(Rail) is working fine, since it gives back the ouput.

But on

intervals(lmList(Rail))

I'm getting the following error

Errore in out[, "est.", ] <- coeff[, "Estimate", ] :
  numero di indici non corretto

that translated should sounds like

Error in out[, "est.", ] <- coeff[, "Estimate", ] :
  not correct indexes number

What is that I'm not considering here ?

Thanks


-- 
Ottorino-Luca Pantani, Universit? di Firenze
Dip. Scienza del Suolo e Nutrizione della Pianta
P.zle Cascine 28 50144 Firenze Italia
Tel 39 055 3288 202 (348 lab) Fax 39 055 333 273 
OLPantani at unifi.it  http://www4.unifi.it/dssnp/