Error (21217): ALTERA_CRCERROR_VERIFY megafunction is not instantiated for stratixiv_crcblock primitive instance "crcblock_component" - Error (21217): ALTERA_CRCERROR_VERIFY megafunction is not instantiated for stratixiv_crcblock primitive instance "crcblock_component" Description The EDCRC false error known issue found in Stratix® IV device and Arria® II device families require instantiation of an Altera CRCERROR Verify v12.0 megafunction. However, the Altera CRCERROR Verify v12.0 megafunction is not available in the Quartus® II software version 12.0. During compilation of a design that uses the error detection CRC feature, the Quartus II software reports above error. Resolution Refer to the Stratix IV device and Arria II device families errata sheet for the details on this EDCRC false error known issue. If you require the Altera CRCERROR Verify v12.0 megafunction for the EDCRC false error solution in the Quartus II software version 12.0, install patch 0.04 from the following links: Download the Quartus II software version 12.0 Patch 0.04 for Windows (.exe) Download the Quartus II software version 12.0 Patch 0.04 for Linux (.tar) Readme for the Quartus II software version 12.0 Patch 0.04 for Linux (.txt) This issue is scheduled to be fixed in a future version of the Quartus II software. Related Articles Error (21216): Cannot enable error detection cyclic redundancy check without instantiating the ALTERA_CRCERROR_VERIFY megafunction. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] 12.0 novalue ['Arria® II GX FPGA', 'Arria® II GZ FPGA', 'Stratix® IV FPGAs', 'Stratix® IV GT FPGA', 'Stratix® IV GX FPGA'] ['novalue'] ['novalue'] ['novalue']