Hi hermann ,
As i see one of your blog for below link but unable to find the attachment .
can you re share MPGW service export .(iput xml as attachemnt MTOM)
https://www.ibm.com/mysupport/s/question/0D50z00006AB0hj/adding-attachment-to-a-soap-response-and-converting-it-into-mtom?language=zh_TW
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