Errors resulting in YSOD when I deploy the app

I have an app that runs fine locally. When I deploy this app to our staging environment, errors that are normally caught are resulting in the 'Yellow Screen of Death', even though the errors are surrounded by Try/Catch blocks and are being logged with ELMAH.

I have no idea why this is the case. Normally the app will deal with the error and keep working. Can somebody suggest what could开发者_Go百科 be causing this?

I don't know what useful info to supply here, so please ask and I'll fill in as much as I can.

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Possibly sounds like a configuration issue. I'd suggest looking in the web.config in the <system.web> <customErrors... section.

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Can you give more info on what exception you're seeing? Special cases like StackOverflowException are uncatchable.

http://msdn.microsoft.com/en-us/library/system.stackoverflowexception.aspx

StackOverflowException used to be catchable on old versions of .NET, but are not anymore. Are your machines running different versions of the framework?

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You could be missing some dependencies. Make sure your staging environment has MVC installed.

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It turns out it was a PEBKAC data-related error.