Hello, [id://dani_cv_74]. It would be very helpful if you were to show the code that is giving you this error. Try to simplify the code as much as possible, down to the shortest bit that still causes the error. As you do this, you may find that the answer jumps out at you. Even if it doesn't, it will give people a chance to see what, exactly, is going wrong.

Also, it would be very helpful if you would use the <code> and </code> tags around your code and output, which makes that text much easier to read.