‘The invoked member is not supported in a dynamic module.’

Error ‘The invoked member is not supported in a dynamic module.’ while generating exception string

While Using ASPUnhandledException.dll for exception handling, I received this error via email.

This error message was not at all helpful in production environment. 

On careful debugging I found out that my Stored Proc failed.

Instead of giving the reason for Stored Proc failure it gave this obscure message. If  someone knows why it gives this message it will be helpful.

(reason my sp failed was because I was calling a non-existing user defined function)