We work exclusively in this area. Over the past 10 years we have implement both Gentran and Harbinger (Premenos) on the AS400 platform.... save yourself the headaches.... go with the Harbinger product. Disclaimer: We are Harbinger resellers, however we were once Gentran resellers also, however in my opinion, Harbinger is the superior product.
EDI Consulting Services, Inc.
540 Powder Springs Street
Marietta, GA 30064
EDI, Communications and AS400 Technical Consulting