Bugs in Q20.1 Vector Waveform Editor and Modelsim simulation. - Bugs in Q20.1 Vector Waveform Editor and Modelsim simulation. Hello, I just upgraded from Q18.1 to 20.1. I found 2 bugs with opening or generating a new .vwf (vector waveform file) and running a functional or timing simulation. 1. When creating a 'New University Program VWF' and adding the IO pins and clock, If I save as with a file name anything other than 'Waveform.vwf', I get an error message: Error (199014): Vector source file C:/altera/Qdesigns/HDMI_480p_1KHz_Sine/Waveform1.vwf specified with --testbench_vector_input_file option does not exist Error: Quartus Prime EDA Netlist Writer was unsuccessful. 1 error, 0 warnings Error: Peak virtual memory: 495 megabytes Error: Processing ended: Sat Jan 09 21:00:35 2021 Error: Elapsed time: 00:00:01 Error: Total CPU time (on all processors): 00:00:01 Error. 2. Now, when I do save the file name as 'Waveform.vwf', I get this new error: # vsim -novopt -c -t 1ps -L cycloneive_ver -L altera_ver -L altera_mf_ver -L 220model_ver -L sgate_ver -L altera_lnsim_ver work.HDMI_test_vlg_vec_tst # Start time: 21:03:23 on Jan 09,2021 # ** Error (suppressible): (vsim-12110) The -novopt option has no effect on this product. -novopt option is now deprecated and will be removed in future releases. # Error loading design Error loading design # End time: 21:03:23 on Jan 09,2021, Elapsed time: 0:00:00 # Errors: 1, Warnings: 0 This used to work fine in Quartus Prime Lite 18.1. Other than downgrading, is there a fix? Replies: Re: Bugs in Q20.1 Vector Waveform Editor and Modelsim simulation. Hi Brian, Remove the novopt command in your script and resimulate. Replies: Re: Bugs in Q20.1 Vector Waveform Editor and Modelsim simulation. Ok, found a solution. I just need to remove the -novopt option every time in the simulator setting as Quartus keeps on inserting it in new projects.