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Common Errors

There's no sound

This can occur because of several different reasons:

• Your audio is muted, your speakers aren't on, etc. Make sure you can hear audio from other sources, like from your browser or your media player. Check your volume mixer to make sure UTAU itself isn't muted.
• You're using a .UST that your active UTAU can't read. First, look at the lyrics of your .UST. Are they latin letters (roumaji)? Are they Japanese characters? Are they garbled and strange-looking (if so, go to the next section). Now look at your UTAU voicebank. Go to Tools > Voice Bank Settings and look at the file names and aliases in the first two columns. The names of either the files or the aliases should match what type of characters the .UST's lyrics are. If they don't match, you need to change to a different UTAU that can read the .UST. If they do match and there's no sound, keep going down the list.
• You're using a .UST that your active UTAU can't read, but it's because you're using a .UST made for a different type of voicebank. If the lyrics on the .UST look like
  te, a, べ、お, etc, it's a CV .UST.
  If the lyrics look like
  a か, -た, e へ, -る, etc, it's a VCV .UST.
  If the lyrics look like
  o ts, か, a p, ど etc, it's a CVVC .UST.
  Now go to Tools > Voice Bank Settings and look at the files and aliases (if it's a VCV or CVVC bank, you'll likely only be able to tell what kind of bank it is from the aliases) to see what type of bank it is (You may also be able to tell from the voicebank name displayed in UTAU or from the readme.txt).
• You don't have Japanese locale installed. If you also have the following error (garbled lyrics), you definitely don't have Japanese locale installed, or it was installed incorrectly. You will have to uninstall UTAU, fix your Japanese locale, and reinstall UTAU. Check your system requirements here, and here is a tutorial on setting up Japanese locale and installing UTAU.

.UST lyrics are garbled gibberish (mojibake)

You don't have Japanese locale installed, or it was installed incorrectly.

You will have to uninstall UTAU, fix your Japanese locale, and reinstall UTAU. Check your system requirements here, and here is a tutorial on setting up Japanese locale and installing UTAU.

If you are unable to use Japanese locale on your machine, because you have an older version of Windows, use a shared computer, or don't have admin access, you can still edit .UST notes by hand if you know hiragana (or pull up a chart). Double-click on a note and it will show its original hiragana lyric. You can overwrite this by just typing the roumaji equivalent directly. This is a very tedious process and I would highly recommend avoiding it. You may be able to use plugins like Bizz's "The Best Things I Could Think Of, Etc" to convert the notes from hiragana to roumaji, but there is no quarantee they will work on a computer without Japanese locale.

Subscript out of range

This error is not very well understood. It is recommended that you save your work often to be safe. For me, this can happen when I am editing the pitch of a note and the program has some sort of problem where the red line (the one that shows up when you hold down the mouse button and select a group) doubles and the error dialog box shows up. If you get this error, you will have to close UTAU either by right-clicking on the icon in your taskbar, or by closing it through the Task Manager.

This error can happen for a few reasons.

• You don't have Japanese locale installed, or it was installed incorrectly. Uninstall UTAU, set up Japanese locale, and reinstall UTAU. System requirements here and locale/UTAU installation tutorial here.
• Your Japanese locale isn't "active". You need to see a J on your taskbar (far right side, most likely) instead of ENG. Visit this page to set your locale to active.
• Some sort of misclick caused UTAU to throw the error. It's out of your control at that point. UTAU isn't a perfect program and these kind of things can happen. As I said previously, the error only happens to me when I'm pitch-editing notes. "Make sure to save often" is all the advice I can offer to protect you from this error.

.UST files open as a blank project

It's probably some sort of locale problem. Either the .UST file is named something your computer can't read, or the folder it's contained in is named something your computer can't read.

For example, you may have Japanese locale installed, but if you download a .UST for a song in Korean and the name of the folder is in Korean, your computer won't be able to read the file name and will just open UTAU as a new, blank project.

You can quickly fix this by renaming the .UST or folder to something your computer can read. Latin letters are almost universally used by computers, so your safest bet is to use those or whatever language your computer was initially set up with.

UTAU crashes when I edit prefix.map or during other specific action

You don't have administrative access for UTAU. You need to make sure you run UTAU as an administrator, every time you open UTAU. This page explains how to run UTAU as an admin.

If you can't get admin access for whatever reason, UTAU should still be usable, it's just that you won't be able to use some specific features, like editing the prefix.map.