An invalid access memory exception may occur in an instance of a BizTalk Server Receive Location Host. This issue occurs when a message that is being read from the MQ queue is configured for a message format of <null>, and the character set configuration for the MQSC Adapter is set to UTF-8.
This issue is fixed in Cumulative Update 2 for Host Integration Server 2016.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Learn about the terminology Microsoft uses to describe software updates.