Miscalculation

That was a slight miscalculation.

Due to the miscalculation, they lost valuable time.

They have also found that the same miscalculation was made in some other cases.

There might have been a miscalculation.

It was a miscalculation.

Dying because of... hail? Now that's a miscalculation and a half.

Tom made a miscalculation that cost his company a lot of money.

I've made a miscalculation.