If you have a revision C or later MSP432P401R device, or a red MSP-EXP432P401R Launchpad (versus the black pre-release Launchpad version, which had a revision B device), you will need updated MSP432ware, CCS, IAR, or Keil tools. Please see this web page for information regarding migration from revision B to revision C: www.ti.com/xms432support See also the app note Moving From Evaluation to Production With MSP432P401x MCUs
Regards,
Katie