Alternative Technology Solutions has rejected claims by Epicor Software that it engaged in infringement of Epicor's copyright and intellectual property. Based in Aliso Viejo, Calif., ATS is a consulting firm that specializes in serving Epicor customers and most of its management worked at Epicor. In a prepared statement, ATS president and Vivian Keena rejected claims made by Epicor in infringement suit against her company and said that its business actually helps Epicor and its customers.