How do I revert from Fast Simulation Models to the Default Simulation Models in Quartus® Prime Pro Edition Software version 25.1.1 onwards? - How do I revert from Fast Simulation Models to the Default Simulation Models in Quartus® Prime Pro Edition Software version 25.1.1 onwards? Description Follow these steps to revert the "Fast Simulation Models" to "Default Simulation Models" in designs targeting Agilex™ 7 FPGA, Agilex™ 5 FPGA, or Agilex™ 3 FPGA devices in the Quartus® Prime Pro Edition Software version 25.1.1 onwards. Resolution Generate the example design from the .ip file or create a custom design for simulation (the same as the current flow). Update the auto-generated simulation script to point to Default Simulation Models by setting the following variables with either of the following methods: Method 1: For Questasim Update the Tcl-based scripts ( msim_setup.tcl ) with the following variables: set DEVICES_SIM_LIB_DIR "$QUARTUS_INSTALL_DIR/../devices/sim_lib/" set QUARTUS_SIM_LIB_DIR "$QUARTUS_INSTALL_DIR/eda/sim_lib/" Method 2: For VCS (2-step), VCS (3-step) Update the qsys-generated script (sh based scripts: vcs_setup.sh or vcsmx_setup.sh ) with the following variables: DEVICES_SIM_LIB_DIR="$QUARTUS_INSTALL_DIR/../devices/sim_lib/" QUARTUS_SIM_LIB_DIR="$QUARTUS_INSTALL_DIR/eda/sim_lib/" The IP example design for these devices has been enabled to use Fast Simulation Models by default in the Quartus® Prime Pro Edition Software version 25.1.1 onwards. Additional Information How do I use the Fast Simulation Models to improve the simulation time in the Quartus® Prime Pro Edition Software version 24.3.1 onwards? Custom Fields values: ['novalue'] Troubleshooting 14024060949 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 25.1.1 ['Agilex™ 5 FPGAs and SoCs', 'Agilex™ 7 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']