Weird error I have no idea how to fix

[lukisodd]

I was using Utsu to experiment, and I loved how my voicebank sounded with "wavtool-yawu." It made the t's soft and the k's very smooth, it sounded so much better than it did with worldline-R. The thing is, once I put the wavtool into Openutau's wavtool folder and tried to use it with Worldline, it threw this error (if mentioned, LukTAU - VCV is referring to the voicebank used):

Failed to render

An error occurred trying to start process '/Users/luk/Library/Caches/OpenUtau/temp.bat' with working directory '/Users/luk/Library/Caches/OpenUtau'. Permission denied

System.AggregateException: One or more errors occurred. (An error occurred trying to start process '/Users/luk/Library/Caches/OpenUtau/temp.bat' with working directory '/Users/luk/Library/Caches/OpenUtau'. Permission denied)
---> System.ComponentModel.Win32Exception (13): An error occurred trying to start process '/Users/luk/Library/Caches/OpenUtau/temp.bat' with working directory '/Users/luk/Library/Caches/OpenUtau'. Permission denied
at System.Diagnostics.Process.ForkAndExecProcess(ProcessStartInfo startInfo, String resolvedFilename, String[] argv, String[] envp, String cwd, Boolean setCredentials, UInt32 userId, UInt32 groupId, UInt32[] groups, Int32& stdinFd, Int32& stdoutFd, Int32& stderrFd, Boolean usesTerminal, Boolean throwOnNoExec)
at System.Diagnostics.Process.StartCore(ProcessStartInfo startInfo)
at System.Diagnostics.Process.Start()
at OpenUtau.Core.Util.ProcessRunner.Run(String file, String args, ILogger logger, String workDir, Int32 timeoutMs) in /Users/appveyor/projects/openutau/OpenUtau.Core/Util/ProcessRunner.cs:line 35
at OpenUtau.Classic.ExeWavtool.Concatenate(List1 resamplerItems, String tempPath, CancellationTokenSource cancellation) in /Users/appveyor/projects/openutau/OpenUtau.Core/Classic/ExeWavtool.cs:line 63 at OpenUtau.Classic.ClassicRenderer.<>c__DisplayClass9_0.<RenderExternal>b__0() in /Users/appveyor/projects/openutau/OpenUtau.Core/Classic/ClassicRenderer.cs:line 119 at System.Threading.Tasks.Task1.InnerInvoke()
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
--- End of inner exception stack trace ---

0.1.529.0

What does this even mean, and what can I do to fix it?

[oxygen-dioxide]

Currently, external wavtools aren't supported on Mac or Linux.