Bank of America Corp. cannot be sued by unified groups of homeowners in different states over its failure to modify mortgages, a federal judge in Boston ruled, Bloomberg Law reported today. Home-mortgage borrowers in 26 states claimed in lawsuits that Bank of America mismanaged loan requests under the Home Affordable Modification Program and sought class-action status to pursue their cases. Bank of America is one of many mortgage lenders participating in HAMP, which is designed to prevent mortgage foreclosures. The homeowners who sued claimed that they made all required trial payments under the plan to the bank and still didn’t receive permanent loan modifications or written denials of eligibility by a certain date. The case is In re Bank of America Home Affordable Modification Program Contract Litigation, 10-02193, U.S. District Court, District of Massachusetts (Boston).