Re: modeling question

From: Manfred Hanke <Manfred.Hanke_at_email.domain.hidden>
Date: Wed, 29 Jul 2009 08:47:16 +0200

Herbert Pablo wrote:
> So, I was trying your method and I ran into a little snag at step 4:  newdata 
> = get_model_counts(1);  % You are getting the counts from
> the model you just fit
> I get the following error message:
> Unable to typecast Null_Type to Double_Type

Are you sure that you have *just* fit your model?
At first sight, it seemed to me that you might not have evaluated your 
model yet (if you did a new startup of ISIS and only load_par'ed your 
parameter file). ISIS doesn't evaluate the model every time you do a 
{plot,get}_model_{counts,flux}, but stores it internally. If one hasn't 
*just* fit the model, one has to do at least an
to evaluate the model on the grid(s) defined by the data.

However, I cannot reproduce your error with the situation described 
above (with ISIS >=1.4.9-55). Which version of ISIS and S-Lang are you 

Furthermore, if you start isis with the -g option and set 
Isis_Verbose=1, you might get some more debug output.


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Received on Wed Jul 29 2009 - 02:47:37 EDT

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