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Re: st: Mata compatibility problem


From   "William Gould, StataCorp LP" <wgould@stata.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Mata compatibility problem
Date   Thu, 20 Feb 2014 09:56:05 -0600

Sergiy Radyakin <serjradyakin@gmail.com> reports having an old Mata
library file that he created, lgeochart.mlib, or perhaps it is a recent
library file created by an old version of Stata -- I'm unclear on this
-- but in any case, when using this file with modern Stata, he gets the
error message

    . mata mata describe using lgeochart
    .\lgeochart.mlib from a older version of Stata
    r(610);

This is an example of error message that was never supposed to be seen
outside of of StataCorp's walls because the eror can only occur when
Stata sees a .mlib file created by a version of Stata that predates
Stata being released to the public!  That is, the .mlib file -- written
in what we call mlib-format 1 -- was used only when Mata existed only 
inside StataCorp. 

When Stata 9 officially shipped, Stata used mlib-format 2, although it 
could probably still read mlib-format 1. 

I can't be sure how Sergiy created a mlib-format 1 file, but I suspect
that we provided Sergiy with a pre-release version of Stata 9 that was
still using the development format.

-- Bill
wgould@stata.com
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