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You can get a better idea of what went wrong by checking out the logs. At that point, you should be able to narrow down the root cause to one of the issues below. If not, please bring it up on the discord or file a bug report


Engine not initialized

This is most likely due to the VSCode workspace file not being open. Make sure to open the dendron.code-workspace file by following the instructions here

Multiple Vaults with the same name

You will get this if you have multiple vaults that have the same name. This is an error with Dendron since Dendron requires all vault names be unique. You can fix this by removing the duplicate vaults or setting a unique name property for the vault.

Notes from the graph/tree view are out of sync

Run Dendron: Reload Index to manually sync. If that doesn't work, you can also try Developer: Reload Window to restart VSCode.


Error upgrading

Dendron will update keybindings/settings/etc to the latest defaults if not currently set on upgrade. If you see the above error, it means that Dendron had trouble parsing one of your settings files. This doesn't stop dendron from starting but it does mean that the latest settings aren't being applied.

The most likely culprit of this error is a bad snippets file. To fix, bring up the command prompt, type >Configure User Snippets, open dendron.code-snippets and see if there's anything funky with the json on the line mentioned by the error. You can also use tools like jsonlint to validate your JSON.


I'm getting a you cannot define a mapping item when in a sequence when trying to define a schema

That means there's an issue with your yaml. You can paste it in yaml lint to check that you are using the correct yaml syntax.

Schema Templates aren't working

Schema templates are defined as YAML objects. The most common mistake is putting them down as a list

For example, this is a valid schema.

- id: journal
  title: journal
  desc: ""
  parent: root
    - daily
- id : daily
  namespace: true
    id: journal.template.daily
    type: note

This is not a valid schema.

- id: journal
  title: journal
  desc: ""
  parent: root
    - daily
- id : daily
  namespace: true
    - id: journal.template.daily
      type: note

Markdown Preview

Why can't I click the checkbox?

It could be that you are using the VSCode default markdown instead of Dendron's Markdown Preview.

They both have identical icons and its currently not possible to disable the builtin preview (we are looking into fixing this here).

Meanwhile, you can open Dendron's markdown preview by clicking the preview button on the left of the menu bar or by using the > Markdown Preview Enhanced: Open Preview to the Side command

Markdown preview

Still initializing. Please close this window and try again after Dendron has been initialized.

When Dendron starts up, it initializes a local server which is responsible for indexing notes and fetching note metadata. Plugins like the preview depend on the server being initialized before activating. You'll know the server is initialized after you see a Dendron is activated notification.

Get the logs

Open the output view and use the dropdown menu to find the log titled DENDRON.


Reference to Another Note on Ubuntu

If Ctrl+Shift+R (reference to another note) doesn't work on Ubuntu, do sudo apt install xsel.


Can't open local preview

Dendron runs the preview on port 8080. Make sure you don't have something already running there.

  • windows
# get ids of processes
Get-Process -Id (Get-NetTCPConnection -LocalPort 8080).OwningProcess

# if you see any result, you can stop them using the following command
Stop-process -Id {IDS_FROM_ABOVE}
  • linux
# get ids
lsof -l -n -P -i tcp:8080 

# kill
kill -9 {IDS}


Error: spawn git ENOENT

Check if you have git installed. You can find more details here

This is likely due to other extensions that you have installed that provide conflicting definitions for wiki links.

The most likely culprits are foam or markdown-notes. Uninstalling them will fix this issue.

You can see your installed

Dendron fails to initialize

  • check if you have a file with two consecutive dots: eg.

Send a support request

If none of the troubleshooting methods work, you can ping kevin on Discord or submit a github issue.

When doing either of these things, please include the following information: