Sutter Insurance Company v. Applied Systems, Inc.

POSNER, Circuit Judge.

This is a diversity suit, governed by Illinois law, for breach of contract. (Certain other claims have dropped out.) The plaintiff, Sutter, is an insurance company that purchased the “Diamond System,” a computer software program, from the defendant, Applied, which designs and sells business applications software. Sutter had to replace its existing software because the provider had announced that it would soon cease providing updates. The district judge, after a bench trial, rejected Sutter’s claims but also Applied’s counterclaim; only Sutter has appealed.

The contract,…