After jumping through the hoops of updating DPM2016 to UR2 to support the DPM SQL instance running SQL 2016, our SSRS broke.

Error received-

Failed to load expression host assembly. Details: Could not load file or assembly ‘ReportSRV5, Version=1.0.523.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ or one of its dependencies. The system cannot find the file specified. (rsErrorLoadingExprHostAssembly)

dpm ssrs error


Copy ReportSRV5.dll from old SSRS directory to new.

\Program Files\Microsoft SQL Server\MSRS12.MSSQLSERVER\Reporting Services\ReportServer\bin

\Program Files\Microsoft SQL Server\MSRS13.MSSQLSERVER\Reporting Services\ReportServer\bin\