Error - Can't load ftd2xx.dll

Modified on Wed, 21 Sep 2022 at 02:13 PM

This is a really old problem that has changed over the years. Drivers can still be a problem to load and require a little help on some systems. This is offered more as legacy information.
  1. Has the RT Systems USB cable been plugged in yet? If not, please attach the appropriate RT Systems USB cable for this programmer. Give Windows a little time to complete installation of the drivers. Try Get or Send data again.
  2. This happens more often with XP. Basically, you are installing the drivers manually which is available and can be used in other Windows versions.
    • Attach the USB cable and let it start the New Hardware Wizard.
    • Take all options in the Wizard to find the files manually.
    • The files that you need are at C:\Program Files(x86)\Common Files\RT SystemsV5\RTDrivers\USBComDrivers\Drivers
    • Run the New Hardware Wizard once using ftdibus
    • Then a second time using ftdiport (Usually the New Hardware Wizard will begin again on its own.
    • After this second execution of the Wizard, unplug the USB cable. Count to 10. Plug it back in. You should see Windows accept it and make it ready to use.
  3. Unplug the RT Systems USB cable and plug it into a different USB port on your computer.
  4. Running updates may help. Run the update for the programmer from Help | About or from the Support section of
  5. Be sure you are using the RT Systems USB cable. The RT Systems Programmers work only with the RT Systems USB cables.

04/30/2014 12:31PM

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