Quartus: Fatal Error: Segment Violation: faulting address=(nil), ... Module: quartus_fit - Quartus: Fatal Error: Segment Violation: faulting address=(nil), ... Module: quartus_fit Description Due to a problem in Intel® Quartus® Prime Pro Edition Software v21.1, you might see this error during the Fitter Retime stage. This error occurs when using an Intel Agilex® device where there is a critical chain on constrained I/Os. Resolution A patch is available to fix this problem for the Intel® Quartus® Prime Pro Edition Software v21.1. Download and install patch 0.01 from the following links: Patch 0.01 for Windows (.exe) Patch 0.01 for Linux (.run) (To download .run file, right-click on the link, choose Save link as ) Readme for patch 0.01 (.txt) Custom Fields values: ['novalue'] Troubleshooting 22012702412 True ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 21.1 ['Agilex™ 7 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']