[R] Help me: nls and try function

[jarod_v6]

Dear All,
I have these problems:

1) How can use the function try in nls model:

try(nls(...))

2) I have 100 colun with data and I want ro prepare 99 file with the first colun with the others

Time A1 A2 A3 A4 AN.....

I want to have 99 files with 
a)Time and A1
b)Time and A2
n) Time AN

thanks for any help
M