Why MATLAB is showing busy string the code attached below?

I have done the coding of a model (I have attached the image of the model and the code).

MATLAB is showing busy.

Could you please tell me how to fix the issue?

Thanks :)

[Walter Roberson]

Your outputs quickly diverse to +/- 1e38 after which the precision loss is so great that you make no further progress.

[parag gupta]

Thank you Walter

Could you please tell what needs to be done to get graphs of the given model (pic attached) ?

[Walter Roberson]

Sorry, I do not know. However the equations you programmed do not appear to be the same as the diagram.

[parag gupta]

Could you pls tell me how they are different?

[Walter Roberson]

Look at the number of terms in v1 compared to your first equation. Your first equation has two terms but none of your v* have as few as two terms.

[parag gupta]

actually w(t) = a2+a3f(t) its written at end of the model

[Walter Roberson]

I went through the system in symbolic form, but I was not able to figure out the correspondance between terms.

I have not worked with dde23() before, and I seem to have missed some things.

[parag gupta]

thanks Walter:)