Indiana Code Title 34. Civil Law and Procedure § 34-13-5-12

Sec. 12. Where:

the plaintiff in a public lawsuit is not entitled to raise any issue in the public lawsuit that the plaintiff could have but did not raise at the hearing.  Any matters or issues relating to any procedural matters that were not raised and could have been redone or corrected following the hearing are declared to be irregularities and not jurisdictional to the power of the municipal corporation or its governing body in connection with the construction, financing, or leasing.