I've never seen that before, Doing some research it seems to be an issue if you have multiple versions of SSIS installed:

https://connect.microsoft.com/SQLServer/feedback/details/744390/ssis-any-pre-2012-error-cannot-apply-indexing-with-to-an-expression-of-type-microsoft-sqlserver-dts-runtime-variables

http://support.microsoft.com/kb/938608/en-us/

http://stackoverflow.com/questions/24409771/cannot-apply-indexing-with-to-an-expression-of-type