• As you have noticed, you need to "downgrade" your package to SSIS 2005 runtime level, if even possible (because of new features in SSIS2008).

    How ?

    IMO it is just better to develop your package in its tightly coupled BIDS environment.

    Or (as you stated) prepare an SSIS environment for each BIDS version you have (and prepare upgrade scenarios for your dev teams, operational packages, ...).

    Johan

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