warning while running optimization tool

Index in position 1 exceeds array bounds (must not exceed 40)

What does this mean?photo is attached below

please help

Answer 1

[Walter Roberson]

We can predict that your objfun has a place where you use Variable(Parameter) where you should have Variable.*(Parameter)

That is, you try to use implicit multiplication, but MATLAB does not have implicit multiplication, and the operation you are accidentally invoking is indexing instead of multiplication.

In MATLAB A(B) is always either indexing variable A at offset B, or else calling the function indicated by A passing in parameter B. A(B) in MATLAB never means to multiply A and B.

[DEV]

ok got it

thank you