ISSUE: ERROR -- [Exception] System.ApplicationException: Error fetching records (DoSearch()): The underlying connection was closed: An unexpected error occurred on a receive...***When sending an email.


When sending a large email, the following error appears:

[Exception] System.ApplicationException: Error fetching records (DoSearch()): The underlying connection was closed: An unexpected error occurred on a receive.
at Blackbaud.Web.Content.Core.Data.RecordSearch.DoSearch()
at Blackbaud.Web.Content.Core.DataSourceConstituentFetch.StartPagedFetchByQueryID(Int32 QueryID, Int32 RecordsPerPage, IDataSourceFetchFields[] FetchFields, String options, Int32 SystemID)
at Blackbaud.Web.Content.Core.EmailJob.ProcessQuery2(BBQueryType oQuery, String sSourceKey, EmailList oList)
at Blackbaud.Web.Content.Core.EmailJob.ProcessList(Int32 iListID)
at Blackbaud.Web.Content.Core.EmailJob.ProcessAddressees()
at Blackbaud.Web.Content.Core.EmailJob.DoProcessMailBlast()
at Blackbaud.Web.Content.Core.EmailJob.ProcessMailBlast()
Download and install the latest patch, which contains all fixes from previous patches. If you are running an older version, download and install the latest version and then the patch. 

Ensure that the Blackbaud NetCommunity service is running the resend the message out again

Environment

 2.93.2034, patch 27

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