Unhandled exception. System.IO.IOException: The process cannot access the file

[WangYu0611]

?> Loaded 3829944 vertices, 1758548 faces in 4727ms
-> Splitting with a depth of 1
?> Done 22249 edge splits in 3891ms (5.72 split/ms)
-> Writing tiles
!> Exception: Index was outside the bounds of the array.

=> Pipeline completed in 00:48:46.2553339
=> Cleaning up
Unhandled exception. System.IO.IOException: The process cannot access the file 'Mesh-XL-YL-texture-SimplygonCastMaterial_016.jpg' because it is being used by another process.
at System.IO.FileSystem.RemoveDirectoryRecursive(String, WIN32_FIND_DATA&, Boolean)
at System.IO.FileSystem.RemoveDirectory(String, Boolean)
at Obj2Tiles.Program.Run(Options opts)
at CommandLine.ParserResultExtensions.WithParsedAsync[T](ParserResult1 result, Func2 action)
at Obj2Tiles.Program.Main(String[] args)
at Obj2Tiles.Program.

(String[] args)