Symptoms
Assume that you receive a message from a partner through the Microsoft BizTalk Accelerator for RosettaNet (BtaRN). If the message has one or more attachments (for example, a multi-part message where one or more parts are attachments), BtaRN saves each attachment to a file. However, each saved attachment may pointlessly show zero-bytes appended to the end of its actual content.
Resolution
Cumulative update information
The fix that resolves this issue is included in Cumulative Update 2 for BizTalk Server 2013 R2.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the service pack and cumulative update list for BizTalk Server. Learn about BizTalk Server hotfixes and cumulative update support.