check referenced models do exist

I have a model which contains multiple models referenced to it sequentially.

Eg. Main_model has 2 mdlrefs sub_mdl1 and sub_mdl2. sub_mdl1 has 4 mdlrefs and sub_mdl2 has 5 mdlrefs.

I'm trying to configure a setting in all the referenced model within Main_model.

The script seems to work correctly if all the ref models(within Main_model) do exist in the directory.

But suppose if one(sub_mdl1_num2) of the 4 models of sub_mdl1 is renamed or missing(for that matter), then the command

modelRefNames = find_mdlrefs('sub_mdl1', 'ReturnTopModelAsLastElement', false)

results in an error:

No system or file called 'sub_mdl1_num2' found.

Error in load_model

This made me think. As I'm dealing with a model which is dependent on other models(being generated at a later stage, assume Stage 2),

so running this script at Stage 1 will result in this error, due to unavailability of sub_mdl1_num2, which is meant to be generated at Stage 2.

Keeping a check if all the referenced models are present or not before the configuring a setting would be great.

So, this is where I'm stuck. Do we have any feature/function within find_mdlrefs, which can warn us before trying to load absent model ?

Or anything of this sort. I just want the existing and easiest way to do so,

because adding another maneuver to perform this prior check would mean another 5-6 seconds added to script execution.

Thanks in advance, umesh.

Answer 1

[Fangjun Jiang]

You can do this.

MdlRef=find_system(Model,'BlockType','ModelReference');
for k=1:length(MdlRef)
SubModel=get_param(MdlRef{k},'ModelFile');
if ~exist(SubModel,'file')
error([SubModel,' does not exist'])
end
end

To make this work for nested model reference, you need to make the above code a recursive function.

Keep in mind, the only way to find what's inside a model is to load or open the model. In the nested situation, if 'sub_mod1.slx' does not even exist, there is no way to know how many model references exist in 'sub_moe1'.

[you mess]

Thanks for your valuable answer. Actually, I was hoping for a simpler solution, maybe a parameter within the find_system() or find_mdlrefs().

Anyway, I've used the given snippet and I've noticed that if the model doesn't exist in the dir(s) then SubModel will return an empty string. So instead of exist() I'm simply checking if it's not empty.

Thanks for your help ! appreciate it !