Josh,
So you're needing to custom log errors in SSIS, and naturally you seek to utilize the "OnError" event handler. You don't want to have to implement an event handler on each task, so you create one at the package level. You place an "Execute SQL Task" in the event handler and set it up to log the error. Great!
You then test with an error, and the event handler runs, but when you go to check the custom log in SQL Server, you see multiple entries for the same error! There has to be a way to ensure only one error gets logged...
