Error: (vsim-SDF-3250) in Modelsim-Altera Gate-level simulation - Error: (vsim-SDF-3250) in Modelsim-Altera Gate-level simulation Description Due to a problem in the Quartus® II software version 11.0 SP1 and later, you may see an error like the following when running the ModelSim-Altera Edition software for gate-level simulation. # ** Error: (vsim-SDF-3250) <filename> .sdo( <line number> ): Failed to find INSTANCE 'wire_delay'. module name : cycloneiii_routing_wire instance name : wire_delay Resolution To work around this problem, edit the <design> _run_msim_gate_vhdl.do file and add the options -sdfnoerror -sdfnowarn to the vsim command. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 11.0.1 ['Cyclone® III FPGAs'] ['Simulation Dev Tools ModelSim'] ['novalue'] ['novalue']