FIX: Debugging an SSIS package in SSDT 2017 always starts DtsDebugHost in 32-bit instead of 64-bit

Applies to: SQL Server 2017 Developer on WindowsSQL Server 2017 Enterprise Core on WindowsSQL Server 2017 Enterprise on Windows


Assume that you install SQL Server Data Tools (SSDT) 2017. When you try to debug a SQL Server Integration Services (SSIS) package in SSDT, the DtsDebugHost always starts in the 32-bit mode instead of the 64-bit mode.


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 SQL Server:
About cumulative updates for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:


The 64-bit version of DtsDebugHost is found in the following location:

C:\Program Files\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Microsoft\SSIS\140\Binn\DtsDebugHost.exe

To work around this issue, copy the DtsDebugHost file from the VS folder to the correct location:
copy "C:\Program Files\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Microsoft\SSIS\140\Binn\DtsDebugHost.exe" "C:\Program Files\Microsoft SQL Server\140\DTS\Binn"


Learn about the terminology that Microsoft uses to describe software updates.