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Hello,
Error message says Modelsim is unable to find out 'dac_top_tb' module. It looks like you have not compiled 'dac_top_tb' module using vlog command before running vsim command. Have you? If not, please do that and let us know what happens.
Cheers,
Bhaumik
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Hmm. So I tried to vlog the test bench, but this is the output:
VSIM(paused)> vlog D:/Users//Desktop/Research/QuartusII/March2016/DACSimulation/simulation/modelsim/dac_top.vht# Model Technology ModelSim ALTERA vlog 10.4b Compiler 2015.05 May 27 2015# Start time: 15:41:11 on Mar 25,2016# vlog -reportprogress 300 D:/Users//Desktop/Research/QuartusII/March2016/DACSimulation/simulation/modelsim/dac_top.vht # ** Error: (vlog-13036) D:/Users//Desktop/Research/QuartusII/March2016/DACSimulation/simulation/modelsim/dac_top.vht(1): near "--": Operator only allowed in SystemVerilog.# # ** Error: (vlog-13069) D:/Users//Desktop/Research/QuartusII/March2016/DACSimulation/simulation/modelsim/dac_top.vht(1): near "--": syntax error, unexpected --, expecting class.# # End time: 15:41:11 on Mar 25,2016, Elapsed time: 0:00:00# Errors: 2, Warnings: 0# C:/altera/15.1/modelsim_ae/win32aloem/vlog failed.
Does vlog work on vht test bench files normally? I used the testbench creator tool, which gave me the .vht. They are using "--" to denote comment lines.
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