[ADMB Users] Please test updated installation documentation - Bug still not fixed

Alex Campbell ghostofsandy at gmail.com
Thu Nov 21 18:29:35 PST 2013

I posted on this a couple of years ago. See "mceval output inconsistent
with mcmc display". The last word there is me saying I've figured it out
and I'll send you the code to reproduce the issue off list. Can't remember
if I did, and don't have access to those emails to check. I think I did
send it to you and never heard back. I assumed since no one else had come
across this since that time it might have been resolved with updates to the
mingw compiler. But no. Came across it again about six months ago on
another model, ADMB version 10 i think or maybe 10.1. I was in the process
of winning over a colleague to the ADMB cause and had to basically say well
its great but its broken on windows. We ran the same code, same inputs on
linux and it diagnosed the unidentifiability (can't remember the exact
message but i assume it was telling us that the hessian was singular to
machine precision). We had an unidentifiable virgin recruitment in one
spatial region, which made sense in hindsight. If you can't find the code
and inputs I sent you in June-July 2011 (or if I didn't?) I can dig around
for the more recent model. Can't remember if I've checked this out on a
visual studio compiler but I have a hunch the issue is mingw not windows in

On Fri, Nov 22, 2013 at 1:19 AM, dave fournier <davef at otter-rsch.com> wrote:

> My experience of the mingw compiler is that with it ADMB fails to diagnose
> singular or near singular hessians. This is a minefield for inexperienced
> users and in my opinion it should not be supported. Has no one else seen
> this issue?
> Alex
> That seems highly unlikely in the sense that the mingw compiler would be
> different
> from any other compiler in this manner. Do you have an example?
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> Users at admb-project.org
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