I posted my issue in the Tivaware forum but thought it could be a CCS issue since something in the project changed. Perhaps someone here could offer an explanation to how changing the Device type could break the project. Creating a new project with the old LM3S chip doesn't work either so maybe a workspace problem?
http://e2e.ti.com/support/microcontrollers/tiva_arm/f/908/p/284224/991906.aspx#991906
