zellij-org/zellij · error · anyhow::Error

no active pane for client {client_id}

Error message

no active pane for client {client_id}

What it means

Returned by Tab::paste_to_active_terminal when Tab::get_active_pane_id returns None for the client. The paste buffer is dropped: there is no focused pane (floating or tiled) to receive the pasted bytes, so the paste silently fails with an error Result.

Source

Thrown at zellij-server/src/tab/mod.rs:4380

        let bracketed_paste_begin = vec![27, 91, 50, 48, 48, 126];
        let bracketed_paste_end = vec![27, 91, 50, 48, 49, 126];

        self.write_to_pane_id(&None, bracketed_paste_begin, false, pane_id, None, None)?;
        self.write_to_pane_id(&None, bytes, false, pane_id, None, None)?;
        self.write_to_pane_id(&None, bracketed_paste_end, false, pane_id, None, completion)?;
        Ok(())
    }

    pub fn paste_to_active_terminal(
        &mut self,
        bytes: Vec<u8>,
        client_id: ClientId,
        completion: Option<NotificationEnd>,
    ) -> Result<()> {
        let err_context = || format!("failed to paste to active terminal for client {client_id}");
        let active_pane_id = self
            .get_active_pane_id(client_id)
            .ok_or_else(|| anyhow!("no active pane for client {client_id}"))
            .with_context(err_context)?;
        self.paste_to_pane_id(bytes, active_pane_id, completion)
    }

    pub fn write_to_pane_id(
        &mut self,
        key_with_modifier: &Option<KeyWithModifier>,
        raw_input_bytes: Vec<u8>,
        raw_input_bytes_are_kitty: bool,
        pane_id: PaneId,
        client_id: Option<ClientId>,
        completion_tx: Option<NotificationEnd>,
    ) -> Result<bool> {
        // returns true if we need to update the UI (eg. when a command pane is closed with ctrl-c)
        let err_context = || format!("failed to write to pane with id {pane_id:?}");

        let mut should_update_ui = false;
        let is_sync_panes_active = self.is_sync_panes_active();

View on GitHub (pinned to 98a0837077)

Solutions

1. Confirm a pane is focused (visible cursor) before pasting; open or select a pane and retry
2. Check that the paste target tab has live panes: `zellij action new-pane` if the tab is empty
3. For automation, sequence paste after a focus/render event, not immediately after tab/pane mutations
4. If paste repeatedly fails on a live tab, run with `zellij --debug` and inspect the log for focus errors

Example fix

// before
let active_pane_id = self
    .get_active_pane_id(client_id)
    .ok_or_else(|| anyhow!("no active pane for client {client_id}"))
    .with_context(err_context)?;

// after: degrade gracefully using the first selectable pane
let active_pane_id = self
    .get_active_pane_id_or_first_selectable(client_id)
    .ok_or_else(|| anyhow!("no active pane for client {client_id}"))
    .with_context(err_context)?;

// verify paste target before pasting
if tab.get_active_pane_id(client_id).is_none() {
    log::debug!("paste dropped: no active pane for client {client_id}");
    return Ok(());
}

fn paste_target_exists(tab: &Tab, client_id: ClientId) -> bool {
    tab.get_active_pane_id_or_first_selectable(client_id).is_some()
}

match tab.paste_to_active_terminal(bytes, client_id, completion) {
    Ok(()) => {},
    Err(e) => log::debug!("paste skipped for client {client_id}: {e:#}"),
}

When it happens

Trigger: Calling paste (bracketed paste, Ctrl+V/paste keybinding, or programmatic paste via the session) when the client's active pane cannot be resolved - empty tab, all panes closed, focus in transition after a pane exit or tab switch.

Common situations: Pasting right after the focused pane's process exits; pasting while floating panes are toggled visible with none focused; clipboard managers auto-pasting into a transiently empty tab; scripting paste before focus settles.

Related errors

• Could not find editor pane to replace - is no pane focused?
• failed to find active pane id for client {client_id}
• Failed to find active pane
• FocusPaneByPaneId missing pane_id
• Could not find editor pane to replace

AI-assisted analysis of zellij-org/zellij@98a0837077 (2026-08-16). Data as JSON: /api/errors/334e97e2fed4db47. Report an issue: GitHub.