Critical Warning(25207): A programming file will not be generated because the assembler identified some pins have missing I/O Standard assignments. Refer to the I/O Assignment Warnings table in the fitter report for details. - Critical Warning(25207): A programming file will not be generated because the assembler identified some pins have missing I/O Standard assignments. Refer to the I/O Assignment Warnings table in the fitter report for details. Description Due to a problem in the Quartus® Prime Pro Edition Software version 25.3.1 and earlier, you might see this critical warning during the Assembler stage when assigning the I/O Standard to the negative differential pins of the Agilex® 5 FPGA devices and Agilex® 3 FPGA devices. This is due to the I/O Standard of the negative differential pin is not reflected in the Quartus® .qsf file even though the I/O Standard had been assigned to the negative differential pin in the Pin Planner. Resolution To work around this problem, add the assignment below in the .qsf: set_instance_assignment -name IO_STANDARD "<I/O_Standard>" -to "<negative_differential_pin_name>" -entity <entity_name> This problem is scheduled to be fixed in a future release of the Quartus® Prime Pro Edition Software. Custom Fields values: ['novalue'] Troubleshooting 15019140026 novalue ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 25.3.1 ['Agilex™ 5 FPGAs and SoCs', 'Agilex™ 3 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']