  We investigate regularization of scalar one-loop integrals in the Pauli-
Villars subtraction scheme. The results depend on the number of sub- tractions,
in particular the finite terms that survive after the diver- gences have been
absorbed by renormalization. Therefore the process of Pauli-Villars
regularization is ambiguous. We discuss how these am- biguities may be resolved
by applying an asymptotically large number of subtractions, which results in a
regularization that is automatically valid in any number of dimensions.
