If you create a client that obtains multiple EDI documents (for example, reading them from file) and you want to loop and send each EDI document to Trading Networks in one invocation of your client, you must be careful to cleanup the pipeline between sending each document. Use either the wm.tn:receive service or wm.tn.doc.xml:routeXml service to send the document. Then, after each invocation of either of these services, drop the editn_env parameter from the pipeline.