It seems interchange ecs is missing. Can you try after uploading interchange ecs in your document type (D01B) configuration under Interchange tab? Make sure to redeploy the agreement after uploading interchange ecs.
The issue got resolved after uploading interchange.ecs file,but i am facing one issue like i want to pass the UNB segment values from the XSLT(from bpel code). B2B console is adding one UNB segment by default.so in the Outbound file there are two B2B segments are coming like below.
Make sure that your transaction set ecs (uploaded in Document Defintion) does not have interchange (UNB & UNZ) and group (UNG and UNE) segments. It must have only transaction set segments (UNH to UNT). From back-end you must pass XML containing only transaction set segments.