How to catch 'not enough input arguments' error?

Is there any way I can catch the error 'Not enough input arguments'? For e.g. the below line in a function of my big code throws this error.

spn=spans(index)   %spans is an array of 9 elements and 'index' itself is something I extract from an array 

Problem: As this line is inside a function, the code stops upon getting error and I can't access the function workspace to see what was causing this. And since this error does not appear every time but mostly after a long time the code runs, it is not feasible for me to put breakpoint here and check every time by pressing continue

So is there any piece of code I can write here and put a breakpoint so that when this error comes it it pauses there for me to see the value of index or the corresponding function parameters?

Answer 1

[Chunru]

Use try-catch:

try
    spn=spans(index)
catch
    whos index   % show the inforamtion of the variable index
    disp(index)
end

[Jaya]

Thanks! Through this, I was able to find the error I was making.

And maybe you can comment the 'whose index' line. Just to not cause error for future users who might directly copy paste this code snippet.

[Chunru]

It should be "whos index" to show the variable information when an error is catched.

[Jaya]

Oh ok. That's what I thought later. Thanks.