MonoGame/MonoGame · error · ArgumentNullException

path

Error message

path

What it means

Thrown by Texture2D.FromFile(GraphicsDevice, string path, ...) as an ArgumentNullException when path is null. FromFile opens the file at that path and decodes it, so a null path cannot be opened.

Source

Thrown at MonoGame.Framework/Graphics/Texture2D.cs:664

			this.GetData(0, null, data, 0, data.Length);
		}

        /// <summary>
        /// Creates a <see cref="Texture2D"/> from a file, supported formats bmp, gif, jpg, png, tif and dds (only for simple textures).
        /// May work with other formats, but will not work with tga files.
        /// This internally calls <see cref="FromFile(GraphicsDevice, string, Action{byte[]})"/>.
        /// </summary>
        /// <param name="graphicsDevice">The graphics device to use to create the texture.</param>
        /// <param name="path">The path to the image file.</param>
        /// <param name="colorProcessor">Function that is applied to the data in RGBA format before the texture is sent to video memory. Could be null(no processing then).</param>
        /// <returns>The <see cref="Texture2D"/> created from the given file.</returns>
        /// <remarks>Note that different image decoders may generate slight differences between platforms, but perceptually
        /// the images should be identical.
        /// </remarks>
        public static Texture2D FromFile(GraphicsDevice graphicsDevice, string path, Action<byte[]> colorProcessor)
        {
            if (path == null)
                throw new ArgumentNullException("path");

            using (var stream = File.OpenRead(path))
                return FromStream(graphicsDevice, stream, colorProcessor);
        }

        /// <summary>
        /// Creates a <see cref="Texture2D"/> from a file, supported formats bmp, gif, jpg, png, tif and dds (only for simple textures).
        /// May work with other formats, but will not work with tga files.
        /// This internally calls <see cref="FromStream(GraphicsDevice, Stream, Action{byte[]})"/>.
        /// </summary>
        /// <param name="graphicsDevice">The graphics device to use to create the texture.</param>
        /// <param name="path">The path to the image file.</param>
        /// <returns>The <see cref="Texture2D"/> created from the given file.</returns>
        /// <remarks>Note that different image decoders may generate slight differences between platforms, but perceptually
        /// the images should be identical.  This call does not premultiply the image alpha, but areas of zero alpha will
        /// result in black color data.
        /// </remarks>
        public static Texture2D FromFile(GraphicsDevice graphicsDevice, string path)

View on GitHub (pinned to 1d71bbd0ff)

Solutions

1. Validate the path is non-null (and exists) before calling FromFile.
2. Default missing asset names to a known placeholder file.
3. Use string.IsNullOrWhiteSpace checks at the input boundary.

Example fix

// before
_tex = Texture2D.FromFile(GraphicsDevice, _path, null); // _path == null

// after
if (string.IsNullOrWhiteSpace(_path))
    throw new InvalidOperationException("Texture path not set.");
_tex = Texture2D.FromFile(GraphicsDevice, _path, null);

static string RequirePath(string path)
{
    if (string.IsNullOrWhiteSpace(path)) throw new ArgumentNullException(nameof(path));
    if (!File.Exists(path)) throw new FileNotFoundException(path);
    return path;
}

static bool IsValidPath(string p) => !string.IsNullOrWhiteSpace(p);

When it happens

Trigger: Calling Texture2D.FromFile(device, null); passing a path variable that was never set; building the path from a null config/asset name.

Common situations: Asset name missing from config; user-supplied file path field left blank; refactoring that drops the path argument.

Related errors

• The GraphicsDevice must not be null when creating new resour
• data
• graphicsDevice
• stream
• This image format is not supported

AI-assisted analysis of MonoGame/MonoGame@1d71bbd0ff (2026-08-13). Data as JSON: /api/errors/1a0f1e882246adfa. Report an issue: GitHub.