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:
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.