Errors in ModelSim SE 10.3c and 10.3d when simulating Arria 10 device designs in the Quartus II software version 14.1 - Errors in ModelSim SE 10.3c and 10.3d when simulating Arria 10 device designs in the Quartus II software version 14.1 Description When simulating the Quartus II software version 14.1 in Mentor Graphics ModelSim SE version 10.3c or 10.3d, designs including cascading phase-locked loops (PLLs) and targeting the Arria 10 device cause simulation errors. Downstream PLLs do not lock and generate incorrect frequencies. Resolution You must use the debug version ( -novopt ) when elaborating in Modelsim. Custom Fields values: ['novalue'] Troubleshooting novalue True ['PLL'] ['FPGA Dev Tools Quartus II Software'] novalue 14.1 ['Arria® 10 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue'] - 2021-08-25