st: Syntax problems with maximum likelihood (method lf)

["Katia Bobulova" <katia.bobulova@googlemail.com>]

Dear all,

I am using the likelihood function lf. I have a problem in the end. I
have written the program and I don't have any problem.

I typed:
program define myprogram
version10.1
args lnf a b c d
.
.
.
end

After this I tiped:

ml model lf myprogram (a:) (b:) (c:) (d:)

but Stata tells me that is an invalid syntax. Any suggestion?

Thanks

Katia
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