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Failed to initialize the RTIOStream library during FPGA-in-the-loop simulation

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Bo Zhang
Bo Zhang on 9 Mar 2016
Edited: emanuel Murillo on 2 Apr 2021
Hello, I tried to use HDL coder and HDL verifier to connect the matlab with my FPGA. I did the FPGA-in-the-loop simulation as the tutorial PID Controller, but during simulation, it prompted 'Failed to initialize the RTIOStream library'. How can I solve this problem?
I use JTAG to connect my FPGA board. I pass the FPGA Turnkey test and I am able to load my Verilog/VHDL code to the board and successfully run the program. However, it does not work when trying co-simulation with Simulink and FPGA.
Is the problem because that I only use JTAG for connection? Do I need to use Ethernet for connection as well?
Hope anyone can help me. Thanks a lot!

Accepted Answer

Tao Jia
Tao Jia on 10 Mar 2016
When you test the board, you need to check "include FPGA Board in the test" checkbox to do a full test. Otherwise, it will not try to run the simulation.
When you get error message "Failed to initialize the RTIOStream library" in simulation, can you tell if there's error message printed at the MATLAB console at the same time? Sometimes the error message is printed there.
It would be helpful if you can provide more information regarding your FPGA board.
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More Answers (3)

emanuel Murillo
emanuel Murillo on 1 Apr 2021
Edited: emanuel Murillo on 2 Apr 2021
I just solved it! If someone still has this problem, here is the solution.
This is only for JTAG Connection:
Open filWizard and launch Board Manager, select the board that you will use and clone it.
Then edit the copy that you just made. Remove the ethernet interface from the list.
Not sure what is the real issue , but I think that is due the ethernet interface call a the RTIOStream library, I found out that is for establish tcp communication.
You can try to modify the clock frecuency and pin number as indicated by user manual, I did this and works as well.
English is not my first language, so I beg your pardon for any mistake.

Werner Bachhuber
Werner Bachhuber on 31 Aug 2017
I recently came across the same error message "Failed to initialize the RTIOStream library" with FPGA-in-the-Loop (JTAG mode) after successfully programming the bitstream via JTAG. In my case it could be solved updating the FTDI driver on the Windows computer. Please make sure that you have a recent version of the driver installed (FTDI version 2.12.24.0 from 09/28/16 or later). Hope that helps.
  1 Comment
Solomon Mamo Banteywalu
Solomon Mamo Banteywalu on 19 Nov 2017
This error may also happen if you try to simulate two instances of controller/simulation models in one simulation.I think, during the loading process one instance replaces the other in the FPGA or simulink can not read both instances using the single cable.

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