Consider the following scenario:

    • You are using “MQSeries” adapter on either BizTalk 2010 or 2013
    • Either Windows2008 R2 or 2012 is installed
    • The memory used by the Biztalk process is steadily increasing, but never decrease unless you restart the BizTalk Host instance.
    • You have collected a memory dump of that BizTalk process and you could see indications of outstanding allocations as below:

       oleaut32.dll (a known Windows memory manager) is responsible for 46.46 MBytes worth of outstanding
      allocations. These allocations appear to have originated from the following
      module(s) and function(s):



This issue occurs because Oleaut32.dll does not work correctly when the system frees allocated memory.


Install FIX 2870467:


Hope this helps.