Uahh/ToastFish · warning

ex.Message

Error message

ex.Message

What it means

isFileWave validates whether a file is a WAV file by reading its header through a FileStream; an IOException (file locked, device error, disk full, network path failure) during that read is caught and shown as a raw message box. It is a low-level I/O failure, not a format problem — a non-WAV file simply returns isWave=false without any exception.

Solutions

1. Retry after closing applications that may hold the file open (media players, editors)
2. Check the file exists and is on an available local disk before calling
3. Release/Dispose any FileStream you opened previously on the same path before probing it
4. Catch IOException explicitly in caller code and fall back to SpeechSynthesizer playback instead of failing

Example fix

// before
try { isWave = CheckWaveHeader(fs); }
catch (IOException ex) { MessageBox.Show(ex.Message); }
// after
try { isWave = CheckWaveHeader(fs); }
catch (IOException ex)
{
    Debug.WriteLine($"WAV probe failed for {path}: {ex.Message}");
    isWave = false; // caller falls back to TTS
}

if (!File.Exists(path)) return false;
try { using File.Open(path, FileMode.Open, FileAccess.Read, FileShare.Read); return true; }
catch (IOException) { return false; }

null

try { isWave = isFileWave(path); }
catch (IOException ex) { Debug.WriteLine($"WAV probe IO error: {ex.Message}"); isWave = false; }
catch (Exception ex) { Debug.WriteLine(ex.Message); isWave = false; }

When it happens

Trigger: PlayMp3/isFileWave is called on an mp3/wav path while another process (player, antivirus, indexer) holds the file open exclusively, the file is on an unavailable network/USB drive, or the stream read hits a disk error mid-header-read.

Common situations: Audio file still being written by a download when playback is attempted; removable media unplugged mid-scan; Windows file locking after a crashed player; long-path or permission issues surfacing as IOException.

Understand the failure class

Background: "failed to read file", EACCES, ENOENT and "could not read <path>" errors: when a program can't read a file from disk — this error's family across 49 libraries.

Related errors

• ex.Message, "Excel read error"
• 导入失败，Excel格式不正确或Excel文件损坏
• 程序已经在运行了，不能运行两次。\n如果右下角软件已经退出，请在任务管理器中结束ToastFish任务。
• 卡题出错！
• $"重置 出错！

AI-assisted analysis of Uahh/ToastFish@2508784a66 (2026-09-15). Data as JSON: /api/errors/24755a2309d36e05. Report an issue: GitHub.

Appendix: source

Thrown at Model/Mp3/PlayMp3.cs:177

                // FileStream fs = new FileStream(path, FileMode.Open);
                //fs.Seek(-128, SeekOrigin.End);
                fs.Read(b, 0, 16);
                //Set flag
                String sFlag = System.Text.Encoding.Default.GetString(b, 0, 4).ToUpper();
                String sType = System.Text.Encoding.Default.GetString(b, 8, 4).ToUpper();
                if (sFlag.CompareTo("RIFF") == 0) isSet1 = true;
                if (sType.CompareTo("WAVE") == 0) isSet2 = true;

                if (isSet1 && isSet2)
                {
                    isWave = true;
                }
                fs.Close();
                fs.Dispose();
            }
            catch (IOException ex)
            {
                System.Windows.MessageBox.Show(ex.Message);
            }

            return isWave;
        }
    }
    public class APIClass
    {
        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern int GetShortPathName(
         string lpszLongPath,
         string shortFile,
         int cchBuffer
      );
        [DllImport("winmm.dll", EntryPoint = "mciSendString", CharSet = CharSet.Auto)]
        public static extern int mciSendString(
           string lpstrCommand,
           string lpstrReturnString,
           int uReturnLength,

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