SharePoint 2010 sandboxed deployment error - partial trust app domain

When I attempt to deploy a sandboxed SP 2010 project, I receive the following error:

Error occurred in deployment step 'Add Solution': Unhandled exception was thrown by the sandboxed code wrapper's Execute method in the partial trust app domain: An unexpected error has occurred.

Any ideas about what is causing t开发者_如何学Pythonhis, or how to resolve?

You need to make sure that all your code is authorized to run in a sandbox. It is hard to tell more without seeing the source code.