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st: Problem with syntax - Option X required ... but Options not allowed


From   tiago.pereira@incor.usp.br
To   statalist@hsphsun2.harvard.edu
Subject   st: Problem with syntax - Option X required ... but Options not allowed
Date   Fri, 9 Nov 2007 21:34:54 -0200 (BRT)

Dear all,

I would like to know your opinion about an error I am having when I run a
simple program.

*---------------------------
capture program drop rtpcr
*! rtpcr v1. TVP 2007
program define rtpcr, rclass
version 9.2
syntax varlist(min=2 max=100 default=none numeric) [if] [in] , MODEL(string)
*---------------------------

Assuming I have two variables, a and b:

why does the following problem show up?

. rtpcr a b
option model() required
r(198);

. rtpcr a b, model(overdominant)
options not allowed
r(101);

thank you for any help.

Tiago

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