I'm a complete beginner, but managed to download Mist. It was downloading blocks quite slowly, and I got the message to install the latest version (9.1). I uninstalled the previous one, and went ahead with 9.1. However, now I can't get started as I had previously. I'm getting the following message that I could not connect to the node:

Node type: geth Network: main Platform: win32 (Architecture x64)

...flag provided but not defined: -syncmode

  • flag provided but not defined means that geth does not understand one of your command line arguments. What command line are you using? Sep 28, 2017 at 16:48
  • This is just when I click the GUI. I did, however type "geth console" at the command, and that seems to have gotten me past this issue. Sep 28, 2017 at 16:52
  • syncmode is a command line parameter to geth. you can start geth with geth --syncmode "fast" to speed up the download of the blockchain. Sep 28, 2017 at 16:57

1 Answer 1


Had this issue, this is a problem caused by previous installs of the Mist client.

After I uninstalled through Programs and Features (Win 7), and reinstalled Mist (0.9.3), it worked great.

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