>What is the code in the line referenced by the error message?
>
>oAdvisors = new Advisors();
>
>But now I have much bigger problems - when I exited VS2008 and re-entered, none of the BO references could be found.
>
>So now I am totally hosed :(

Don't panic <g>

Based on your other replies I assume you have a solution with a startup project that references Trinity.BusinessObjects.
Are you referencing the DLL for this from the startup project or have you added the project itself to the solution and referenced that?
Either way you could try removing the reference and re-adding it.....