Warning: (vlib-34) Library already exists at "work". (Quartus2 version 13.0 sp1) - Warning: (vlib-34) Library already exists at "work". (Quartus2 version 13.0 sp1) Hi, I used to simulate the simple schematic. The compile worked fine. But when I ran University program/vwf, There was an error Warning: (vlib-34) Library already exists at "work". I tried to reinstall it. but wasn't work. What can I do? specialization : Device family: Cyclone IV GX Running quartus eda_testbench >> quartus_eda --gen_testbench --check_outputs=on --tool=modelsim_oem --format=verilog test1 -c test1 {--vector_source=C:/altera/13.0sp1/quartus/bin64/project/test1/Waveform1.vwf} {--testbench_file=./simulation/qsim/test1.vt} PID = 1364 ******************************************************************* Running Quartus II 64-Bit EDA Netlist Writer Version 13.0.1 Build 232 06/12/2013 Service Pack 1 SJ Web Edition Processing started: Mon Oct 12 19:35:29 2020 Command: quartus_eda --gen_testbench --check_outputs=on --tool=modelsim_oem --format=verilog test1 -c test1 --vector_source=C:/altera/13.0sp1/quartus/bin64/project/test1/Waveform1.vwf --testbench_file=./simulation/qsim/test1.vt Generated Verilog Test Bench File ./simulation/qsim/test1.vt for simulation Quartus II 64-Bit EDA Netlist Writer was successful. 0 errors, 0 warnings Peak virtual memory: 4577 megabytes Processing ended: Mon Oct 12 19:35:30 2020 Elapsed time: 00:00:01 Total CPU time (on all processors): 00:00:01 Running quartus eda_func_netlist >> quartus_eda --functional=on --simulation --tool=modelsim_oem --format=verilog test1 -c test1 PID = 1128 ******************************************************************* Running Quartus II 64-Bit EDA Netlist Writer Version 13.0.1 Build 232 06/12/2013 Service Pack 1 SJ Web Edition Processing started: Mon Oct 12 19:35:30 2020 Command: quartus_eda --functional=on --simulation=on --tool=modelsim_oem --format=verilog test1 -c test1 Generated file test1.vo in folder "C:/altera/13.0sp1/quartus/bin64/project/test1/simulation/modelsim/" for EDA simulation tool Quartus II 64-Bit EDA Netlist Writer was successful. 0 errors, 0 warnings Peak virtual memory: 4577 megabytes Processing ended: Mon Oct 12 19:35:31 2020 Elapsed time: 00:00:01 Total CPU time (on all processors): 00:00:01 ******************************************************************* Running quartus modelsim >> vsim -c -do test1.do PID = 9324 Reading C:/altera/13.0sp1/modelsim_ase/tcl/vsim/pref.tcl # 10.1d # do test1.do # ** Warning: (vlib-34) Library already exists at "work". # # Model Technology ModelSim ALTERA vlog 10.1d Compiler 2012.11 Nov 2 2012 # -- Compiling module test1 # # Top level modules: # test1 # Model Technology ModelSim ALTERA vlog 10.1d Compiler 2012.11 Nov 2 2012 # -- Compiling module test1_vlg_sample_tst # -- Compiling module test1_vlg_check_tst # -- Compiling module test1_vlg_vec_tst # # Top level modules: # test1_vlg_vec_tst # vsim -L cycloneiv_ver -L altera_ver -L altera_mf_ver -L 220model_ver -L sgate -c -t 1ps -novopt work.test1_vlg_vec_tst Replies: Re: Warning: (vlib-34) Library already exists at "work". (Quartus2 version 13.0 sp1) thank you sir Replies: Re: Warning: (vlib-34) Library already exists at "work". (Quartus2 version 13.0 sp1) thank you sir Replies: Re: Warning: (vlib-34) Library already exists at "work". (Quartus2 version 13.0 sp1) This message does not come from Intel Fortran. I suggest you look for a Quartus2 support channel. - 2020-10-12