Error:129001 Input port OFFSET on atom "|dll_ctrl_a_wys", which is a statixv_dll_offset_ctrl primitive, is not legally connected and/or configured - Error:129001 Input port OFFSET on atom "|dll_ctrl_a_wys", which is a statixv_dll_offset_ctrl primitive, is not legally connected and/or configured Description You might get this error when you synthesize the ALTDLL Intel® FPGA IP in Stratix® V FPGAs with the Quartus® II software version 13.1 if you turn on Instantiate dll_offset_ctrl block and Set statically to options for DLL Phase Offset Control A or DLL Phase Offset Control B block. Resolution To work around this error, follow these steps: Modify the value of the dll_ctr_a_wys.use_offset parameter from true to false in the <DLL variation name>.v file. Re-run the synthesis. This problem is fixed starting with the Quartus® II software version 14.1. Custom Fields values: ['novalue'] Troubleshooting 2205826672 False ['novalue'] ['FPGA Dev Tools Quartus II Software'] 14.1 13.1 ['Stratix® V E FPGA', 'Stratix® V FPGAs', 'Stratix® V GS FPGA', 'Stratix® V GT FPGA', 'Stratix® V GX FPGA'] ['novalue'] ['novalue'] ['novalue']