Got it

[Steve Miller <millers@wright.aps.uoguelph.ca>]

Thanks to all those who replied.

I now have it up and iterating.

Arthur summed it up best with his email which follows.

Dear Steve, you've fallen foul of a little trap.

In the model line you have


> fat start ~ Trait Tr|1.weight !r -weight.animal Tr.animal Tr|1.weight.animal, 
>             -weight.an2 Tr|1.an2 Tr|1.weight.an2 

                           ^^^^^^^
                           
But if you look in the .asr file, you will see ASREML actually renames
this as
                          Tr_1.an2
                          
So you must use this new form in the structure specification



Thanks again for the prompt responses.

Steve