When you configure a Transaction Integrator (TI) application to use Sync Level 1, the application may fail with an AP_STATE_CHECK error message.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
This issue is fixed in the following cumulative update for Host Integration Server:
The ability to have limited support for Sync
Level 1 was added for TI in the previous cumulative update. This fix resolves an issue that causes an
AP_STATE_CHECK error when Sync Level 1 is enabled.
For more information, see Improvement: Host Integration Server 2016 Transaction Integrator adds limited support for Sync Level 1.
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