Symptoms
When you use the DRDA Service, the following error message occurs:
Note
Must declare the scalar variable "@P1".
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Resolution
This issue is fixed in the following cumulative update for Host Integration Server:
Cumulative Update 5 for Host Integration Server 2016
References
Learn about the terminology that Microsoft uses to describe software updates.