Hi ARUNGANESAN03,
According to your description, you can only debug your SSIS package in 32 bit mode, but you want to debug your SSIS package using 64 bit DTDebugHost.exe.
Based on my research, I think the issue is caused by 64bit SSIS runtime is not installed on your machine. We can verify the issue by seeing whether DtsDebugHost.exe under <Installation Drive>\Program Files\Microsoft SQL Server\110\DTS\Binn or
not.
To fix this issue, please install SQL Server and select Integration Services for installation, setup installs all available 64-bit Integration Services features and tools. Then we can set the Debug Options property Run64BitRuntime to True, view the processes
in Windows Task Manager to verify the version of DTDebugHost.exe when debugging the package.
Besides, if the issue still existed, it is my pleasure to help you to reflect your recommendation to the proper department for their consideration. Please feel free to submit your situation on our product to the following link
https://connect.microsoft.com/SQLServer/. Your feedback is valuable for us to improve our products and increase the level of service provided.
References:
http://blogs.msdn.com/b/dataaccesstechnologies/archive/2014/05/22/ssis-packages-executed-from-visual-studio-business-intelligence-development-studio-bids-design-time-on-a-64bit-development-server-goes-to-unresponsive-state-during-package-execution.aspx
http://dougbert.com/blog/post/64-bit-considerations-for-sql-server-integration-services-final.aspx
Thanks,
Katherine Xiong