When we open a Integration Service Project created using SQL 2008, all the required components are available in the Toolbox tab. I tried to upgrade this SSIS package to use the SQL 2012 environment. Upgrading process was successfully completed and I was able to open the package. But the Toolbox tab is empty and could not find any component as in the BIDS 2008. Those components are in the SSIS Toolbox tab. Click SSIS -> SSIS Toolbox to view it.