On Sat, 30 Mar 2013, Gregory Chaudoin wrote:

> I am a fairly new GRETL user in the classroom.  I am teaching an intro
> econometrics course where the students can use GRETL or Eviews.  Everything
> is going well, so far.  But I would like to use SVAR in a follow up course.
> However, I am stuck in neutral.  I downloaded the SVAR package and was
> testing it out using the provided HANSL:
>
> # turn extra output off
> set echo off
> set messages off
> # open the data and do some preliminary transformations
> open sw_ch14.gdt
> genr infl = 400*ldiff(PUNEW)
> rename LHUR unemp
> list X = unemp infl
> list Z = const
> # load the SVAR package
> include SVAR.gfn
> # set up the SVAR
> Mod = SVAR_setup("C", X, Z, 3)
>
>
> This generates the following:
>
> gretl version 1.9.9
> Current session: 2013-03-30 02:18
> # turn extra output off
> ? set echo off
>
> Read datafile C:Files_ch14.gdt
> periodicity: 4, maxobs: 164
> observations range: 1959:1-1999:4
>
> Listing 3 variables:
>  0) const    1) LHUR     2) PUNEW
>
> Data types not conformable for operation
> *** error in function SVAR_setup
>> bundle ret = null

Ah, the idiom that initializes a bundle with "null" is new in
gretl 1.9.12. So you'd need to update your gretl version.

This is a small bug in SVAR, since it's stated to be
compatible back to gretl 1.9.5.

Allin Cottrell

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