Internal Error: Sub-system: BSYN, File: /quartus/fitter/bsyn/retime/bsyn_rtm_flop.cpp, Line: 289 - Internal Error: Sub-system: BSYN, File: /quartus/fitter/bsyn/retime/bsyn_rtm_flop.cpp, Line: 289 Description Due to a problem in the Intel® Quartus® Prime Pro Edition Software version 21.4 and earlier, you might see this internal error during the Finalize stage of fitting. This problem only affects Intel Agilex® 7 devices. Resolution To work around this problem, disable post route physical synthesis optimizations by adding the following assignment to your Intel® Quartus® Settings File (.qsf) : set_global_assignment -name POST_ROUTE_PHYSICAL_SYNTHESIS OFF This problem is scheduled to be fixed in a future release of the Intel® Quartus® Prime Pro Edition Software. Custom Fields values: ['novalue'] Troubleshooting 18020464715 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 22.1 21.3 ['Agilex™ 7 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']