Why doesn’t the Back-Annotate Assignments command in the Quartus® Prime Software save the pin locations? - Why doesn’t the Back-Annotate Assignments command in the Quartus® Prime Software save the pin locations? Description Due to a problem in the Quartus® Prime Software version 18.1, the Back-Annotate Assignments command doesn’t save the pin locations after a successful compilation and generates the following message: The Quartus® Prime Settings File changed outside of the Quartus® Prime software and contains errors. Rewriting the Quartus® Prime Settings with current state of assignments in the Quartus® Prime Software. Resolution To work around this problem, you can manually enter the pin location assignments in the Pin Planner, the Assignment Editor, or the Quartus® Prime Settings (.qsf) file. This problem is fixed beginning with version 18.1.1 of the Quartus® Prime Pro Edition software version. Custom Fields values: ['novalue'] Troubleshooting 586715 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 18.1.1 18.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']