How can I solve this Error message:'Interges can only be combined with ....'?

I got error message like '' ??? Error using ==> mtimes Integers can only be combined with integers of the same class, or scalar doubles. ''

I use rotation transformation in 3D matrix. In previou, code worked well but it is suddenly interfered at rotational matrix. I checked input values but all the values are floating typed and integers. Is anyone possible to understand and have solution on the error? Thank you.

Answer 1

[Walter Roberson]

Locate the integer variable and put double() around the reference to it.

Answer 2

[Soyoung]

Could you explain your comment with example? I am sorry for that I can not understand well the meaning. Sorry. And thank you very much for your quick answer. Also, I found your comment for my last question. It is appreciated too.

[Walter Roberson]

example:

B = I .* A;

would get changed to

B = double(I) .* A;