LykosAI/StabilityMatrix · critical · Exception

Could not find library after setting path

Error message

Could not find library after setting path

What it means

During startup, DoSettingsCheck attempts to locate the Stability Matrix library directory via settingsManager.TryFindLibrary. If no library is found, it shows a path selection dialog and retries; if the retry also fails, it throws this generic Exception because the app cannot function without a library.

Solutions

1. Re-launch and complete the library path selection dialog, choosing the folder containing (or where you want) the Stability Matrix library.
2. Verify the selected directory contains the library marker (e.g. .stabilitymatrix) or let the app create a new library there.
3. Check read/write permissions on the chosen directory (especially under Program Files or network shares).
4. If a portable data folder was moved, restore it to the expected location next to the executable.

Example fix

// before: dialog cancelled, exception thrown
await ShowPathSelectionDialog();
if (!settingsManager.TryFindLibrary()) throw new Exception("Could not find library after setting path");
// after: keep prompting until a valid library is chosen
while (!settingsManager.TryFindLibrary()) { if (!await ShowPathSelectionDialog()) return; }

if (!settingsManager.TryFindLibrary())
{
    var ok = await ShowPathSelectionDialog();
    if (!ok || !settingsManager.TryFindLibrary()) return; // abort startup gracefully
}

static bool HasUsableLibrary(ISettingsManager s) =>
    s.TryFindLibrary() && Directory.Exists(s.LibraryDir);

try { await vm.DoSettingsCheck(); }
catch (Exception ex) when (ex.Message == "Could not find library after setting path")
{
    logger.Warning(ex, "No library configured; prompting user again");
    await ShowLibrarySetupFlow();
}

When it happens

Trigger: App startup (OnLoaded -> DoSettingsCheck) when no existing library is found and the user's path selection dialog flow still leaves TryFindLibrary returning false (cancelled dialog, selected folder not a valid library, unwritable path).

Common situations: First launch where the user cancels the folder picker; user picks an arbitrary folder that isn't a Stability Matrix library; portable-mode data folder missing or moved; permissions prevent reading the library marker file at the chosen location.

Related errors

• Font NotoSansJP not found
• Width is required

AI-assisted analysis of LykosAI/StabilityMatrix@af93d6ef57 (2026-09-12). Data as JSON: /api/errors/46a0f52112c644a8. Report an issue: GitHub.

Appendix: source

Thrown at StabilityMatrix/ViewModels/MainWindowViewModel.cs:147

        var updateWindow = new UpdateWindow(updateWindowViewModel)
        {
            Owner = Application.Current.MainWindow
        };
        updateWindow.ShowDialog();
    }
    
    private async Task DoSettingsCheck()
    {
        // Check if library path is set
        if (!settingsManager.TryFindLibrary())
        {
            await ShowPathSelectionDialog();            
        }
        
        // Try to find library again, should be found now
        if (!settingsManager.TryFindLibrary())
        {
            throw new Exception("Could not find library after setting path");
        }
        
        // Check if there are old packages, if so show migration dialog
        if (settingsManager.GetOldInstalledPackages().Any())
        {
            var dialog = dialogFactory.CreateDataDirectoryMigrationDialog();
            var result = await dialog.ShowAsync();
            if (result == ContentDialogResult.None)
            {
                Application.Current.Shutdown();
            }
            else if (result == ContentDialogResult.Secondary)
            {
                var portableMarkerFile = Path.Combine("Data", ".sm-portable");
                if (File.Exists(portableMarkerFile))
                {
                    File.Delete(portableMarkerFile);
                }

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