When I try to build my project I am getting the below build error. I have not seen this before and searching isn't finding anything that leads me to the right direction. I have looked at the referenced file, and I do not see the problem. Any ideas how I can resolve this?

Error	1	The item "obj\Debug\Pacifica.AccuTrax.Mobile.RouteEvent.resources" was specified more than once in the "Resources" parameter.  Duplicate items are not supported by the "Resources" parameter.	AccuTraxMobile