Internal Error: Sub-system: QHD, File: /quartus/h/qhd_state_details_sys.h, Line: 65 Model 'netlist' does not exist - Internal Error: Sub-system: QHD, File: /quartus/h/qhd_state_details_sys.h, Line: 65 Model 'netlist' does not exist Description Due to a problem with the Intel® Quartus® Prime Pro Edition Software version 21.4, you may see this error when ENABLE_FORMAL_VERIFICATION is set to ON and there are underlying compilation errors in the design. Resolution To work around this problem Change the ENABLE_FORMAL_VERIFICATION QSF assignment to OFF Recompile the project to see the underlying errors Address the errors before setting ENABLE_FORMAL_VERIFICATION back ON This problem is fixed beginning with version 22.1 of the Intel® Quartus® Prime Pro Edition Software. Custom Fields values: ['novalue'] Troubleshooting 14015958023 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 22.1 21.4 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']