flxzt/rnote · error · anyhow::Error

Supplied target file

Error message

Supplied target file `{dir:?}` is not a directory.

What it means

Thrown in `export_doc_pages` when the supplied `gio::File` for the export target passes a file-type query and is not of `gio::FileType::Directory`. Page export requires a directory to write numbered page files into; any non-directory target (regular file, symlink to file, missing entry) is rejected up front.

Solutions

1. Check `dir.query_file_type(...) == gio::FileType::Directory` before calling `export_doc_pages`.
2. Re-select the export folder in the dialog, making sure a directory is chosen.
3. If the folder may be missing, create it first with `gio::File::make_directory_with_parents()`.
4. Verify the path exists and is a real folder (check for symlinks resolving to files).

Example fix

// before
export_doc_pages(dir, file_stem_name, None, &appwindow).await?;
// after
if dir.query_file_type(gio::FileQueryInfoFlags::NONE, gio::Cancellable::NONE) != gio::FileType::Directory {
    anyhow::bail!("Export target is not a directory: {:?}", dir.uri());
}
export_doc_pages(dir, file_stem_name, None, &appwindow).await?;

if dir.query_file_type(gio::FileQueryInfoFlags::NONE, gio::Cancellable::NONE) != gio::FileType::Directory {
    bail!("{} is not a directory", dir.uri());
}

fn is_directory(f: &gio::File) -> bool {
    f.query_file_type(gio::FileQueryInfoFlags::NONE, gio::Cancellable::NONE) == gio::FileType::Directory
}

When it happens

Trigger: Calling `export_doc_pages` with a `dir` GFile that points to a regular file or a non-existent path, e.g. the user picked a file instead of a folder in the export dialog, or the target folder was deleted/moved between selection and export.

Common situations: Exporting document pages after the chosen output folder was removed; a stale bookmark pointing to a file; passing a file path programmatically via CLI or scripting where a directory was expected.

Related errors

• Could not retrieve basename for file
• The output file " " needs to have a supported extension to…
• Exporting document to format with extension
• DocExportFormat try_from
• DocPagesExportFormat try_from

AI-assisted analysis of flxzt/rnote@bbc5354502 (2026-09-08). Data as JSON: /api/errors/9761648d494da79a. Report an issue: GitHub.

Appendix: source

Thrown at crates/rnote-ui/src/canvas/imexport.rs:306

        self.set_last_export_dir(file.parent());

        Ok(())
    }

    /// Exports document pages
    /// `file_stem_name`: the stem name of the created files. This is extended by an enumeration of the page number and
    /// file extension overwrites existing files with the same name!
    pub(crate) async fn export_doc_pages(
        &self,
        appwindow: &RnAppWindow,
        dir: &gio::File,
        file_stem_name: String,
        export_prefs_override: Option<DocPagesExportPrefs>,
    ) -> anyhow::Result<()> {
        if dir.query_file_type(gio::FileQueryInfoFlags::NONE, gio::Cancellable::NONE)
            != gio::FileType::Directory
        {
            return Err(anyhow::anyhow!(
                "Supplied target file `{dir:?}` is not a directory."
            ));
        }
        let export_prefs = export_prefs_override.unwrap_or(
            appwindow
                .engine_config()
                .read()
                .export_prefs
                .doc_pages_export_prefs,
        );
        let file_ext = export_prefs.export_format.file_ext();

        let export_bytes_recv = self.engine_ref().export_doc_pages(export_prefs_override);
        let export_bytes = export_bytes_recv.await??;

        for (i, page_bytes) in export_bytes.into_iter().enumerate() {
            crate::utils::create_replace_file_future(
                page_bytes,

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