It doesn't work. But this is not the problem. The issue is located at the capacity to get the data in the hl7 message. I can't collect every character of the segment with :

do req.GetFieldStreamRaw(.base64, segment)

Thanks for your response. Could you send me a screenshot or the name of the settings I need to use to do so? Thanks

Thanks Stelios,

you are right, the one i should have used was EnsLib.TCP.TextLineInboundAdapter .
Thanks all for responding me.