[R] Use of bread() function

[Samarasinghe, Oshadhi Erandika]

Hello,

I am trying to extract an estimator for the bread of the sandwich
function. I used bread(fitted model) however it seems that I have missed
something as an error message "no applicable method for "bread" appears.

My fitted model is a Spatial simultaneous autoregressive error
model.(errorsarlm in spdep package)

Can anyone please tell me what I might be doing wrong?

Your help is much appreciated.

Thank you,

Oshadhi Samarasinghe.
RA
Department of Economics 
University of Auckland
New Zealand