LykosAI/StabilityMatrix · warning · DataValidationException

Width must be a positive integer

Error message

Width must be a positive integer

What it means

This DataValidationException is thrown by the Width field's Validator in the 'Add Favorite Dimensions' text-entry dialog in InferenceSettingsViewModel. The library throws it because the entered width is either not parseable as an integer or is <= 0; only positive integers are accepted for image dimensions.

Solutions

1. Enter a positive whole number such as 1024 in the Width field
2. If the value came from another tool, round it to a whole integer
3. Do not leave the field blank; 'Width is required' covers empty input

Example fix

// before
var widthText = "-512";
// after
var widthText = "512"; // positive integer only

bool isValidWidth(string s) => int.TryParse(s, out var w) && w > 0;

bool IsValidDimension(string s) => int.TryParse(s, out var v) && v > 0;

try { dialog.SaveDimensions(); } catch (DataValidationException ex) { ShowFieldError("Width", ex.Message); }

When it happens

Trigger: User opens AddRow's 'Add Favorite Dimensions' dialog and types a non-numeric string (e.g. 'abc', '10.5') or a zero/negative number (e.g. '0', '-512') into the Width field.

Common situations: Pasting a dimension pair into the wrong field, typing fractional sizes copied from other tools, entering 0 intending 'default'.

Understand the failure class

Background: "Must be a positive integer", "Invalid value", "Unsupported": the invalid-argument-value error family, when a library rejects the value you pass — this error's family across 35 libraries.

Related errors

• Height is required
• Height must be a positive integer
• Fields line not found
• Resources.Validation_PackageNameCannotBeEmpty
• Sampler not selected

AI-assisted analysis of LykosAI/StabilityMatrix@af93d6ef57 (2026-09-12). Data as JSON: /api/errors/f305e99421cc11dd. Report an issue: GitHub.

Appendix: source

Thrown at StabilityMatrix.Avalonia/ViewModels/Settings/InferenceSettingsViewModel.cs:301

        );
    }

    [RelayCommand]
    private async Task AddRow()
    {
        // FavoriteDimensions.Add(string.Empty);
        var textFields = new TextBoxField[]
        {
            new()
            {
                Label = "Width",
                Validator = text =>
                {
                    if (string.IsNullOrWhiteSpace(text))
                        throw new DataValidationException("Width is required");

                    if (!int.TryParse(text, out var width) || width <= 0)
                        throw new DataValidationException("Width must be a positive integer");
                },
                Watermark = "1024",
            },
            new()
            {
                Label = "Height",
                Validator = text =>
                {
                    if (string.IsNullOrWhiteSpace(text))
                        throw new DataValidationException("Height is required");

                    if (!int.TryParse(text, out var height) || height <= 0)
                        throw new DataValidationException("Height must be a positive integer");
                },
                Watermark = "1024",
            },
        };

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