The Session Integrator Server Service (SIServer) stops servicing Session Integrator requests in Host Integration Server. When this problem occurs, SIServer may log the following Event 11 error message:

The Session Integrator Service received a send request on a session with an invalid cookie.


The fix that resolves this problem is included in the following cumulative updates for Host Integration Server:

Cumulative Update 2 for Host Integration Server 2016

Cumulative Update 4 for Host Integration Server 2013


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.

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