Custom Planet Regenerate Crash - Voxel Load Error?

• Ensure you have installed the latest version of SEToolbox installed. Visit latest release to verify.
• Ensure that the issue is reproducible for testing. You may be requested to provide a link to a test world if we cannot reproduce it with your information.
• Retrieve the Event Log from when SEToolbox crashed. Read the following instructions on retrieving the event log.

SEToolbox Version: 1.187.204.2
SE Version: 1.188.023

SEToolbox crashed

Attempting to regenerate a custom planet

Steps to Reproduce

When I attempt to regenerate planets, SEToolbox crashes.
However, this does not apply to EVERY planet, it seems to only apply to custom planets. I can regenerate the (vanilla) alien world in my save.

SEToolbox Event Log

2018-10-25 05:40:18,496 [1] WARN SEToolbox.Support.DiagnosticsLogging [(null)] - The Space Engineers asteroid file 'C:\Users\REDACTED\AppData\Roaming\SpaceEngineers\Saves\REDACTED(Workshop) Full Solar System 7\RealMarsIRLGrav-1359378911d120000.vx2' could not be loaded, either because it is corrupt, or it is newer than expected.
System.Exception: Cannot load planet generator definition for subtype 'RealMarsIRLGrav'.
at Sandbox.Engine.Voxels.MyPlanetStorageProvider.ReadFrom(Int32 storageVersion, Stream stream, Int32 size, Boolean& isOldFormat)
at Sandbox.Engine.Voxels.MyOctreeStorage.ReadDataProvider(Stream stream, ChunkHeader header, Boolean& isOldFormat, IMyStorageDataProvider& provider)
at Sandbox.Engine.Voxels.MyOctreeStorage.LoadInternal(Int32 fileVersion, Stream stream, Boolean& isOldFormat)
at Sandbox.Engine.Voxels.MyStorageBase.Load(Stream stream, MyStorageBase& storage, Boolean& isOldFormat)
at Sandbox.Engine.Voxels.MyStorageBase.Load(Byte[] memoryBuffer, String fileName)
at Sandbox.Engine.Voxels.MyStorageBase.LoadFromFile(String absoluteFilePath, Dictionary`2 modifiers, Boolean cache)
at SEToolbox.Interop.Asteroids.MyVoxelMap.Load(String filename) in D:\Development\GitHub\SEToolbox\Main\SEToolbox\SEToolbox\Interop\Asteroids\MyVoxelMap.cs:line 195

2018-10-25 05:40:27,267 [1] FATAL SEToolbox.Support.DiagnosticsLogging [(null)] - Unhandled Exception
Application: C:\Program Files (x86)\MidSpace\SEToolbox\SEToolbox.exe
CommandLine: "C:\Program Files (x86)\MidSpace\SEToolbox\SEToolbox.exe" /B /B
CurrentDirectory: C:\Program Files (x86)\MidSpace\SEToolbox
SEBinPath: C:\Program Files (x86)\Steam\SteamApps\common\SpaceEngineers\Bin64
SEBinVersion: 1.188.23
ProcessorCount: 4
OSVersion: Microsoft Windows NT 6.2.9200.0
Version: 4.0.30319.42000
Is64BitOperatingSystem: True
IntPtr.Size: 8
IsAdmin: False
CurrentUICulture: en-US
CurrentCulture:
Times started total: 16
Times started since last reset: 16
Times started since game update: 16

Files:
2018-10-24T11:47:45.6867814-04:00 25,057,840 HavokWrapper.dll
2017-06-02T08:49:12.0000000-04:00 498,176 2014.2.17.1 HelixToolkit.Wpf.dll
2017-03-08T18:26:22.0000000-05:00 276,480 2.0.8.0 log4net.dll
2018-10-23T01:39:25.3455977-04:00 660,128 12.00.21005.1 built by: REL msvcp120.dll
2018-10-23T01:39:25.3465962-04:00 963,232 12.00.21005.1 built by: REL msvcr120.dll
2018-09-09T01:31:30.0000000-04:00 911,360 0.32.0.0 Octokit.dll
2018-10-24T11:47:46.4548546-04:00 75,824 1.0.0.0 Sandbox.Common.dll
2018-10-24T11:47:45.6912731-04:00 7,370,288 1.0.0.0 Sandbox.Game.dll
2018-10-24T11:47:45.6917722-04:00 394,800 1.0.0.0 Sandbox.Graphics.dll
2018-10-24T11:47:48.0843281-04:00 18,480 1.0.0.0 Sandbox.RenderDirect.dll
2018-10-20T09:21:50.0000000-04:00 1,323,008 01.187.204.2 SEToolbox.exe
2017-06-02T08:49:12.0000000-04:00 745 SEToolbox.exe.config
2018-10-20T09:21:44.0000000-04:00 62,464 1.0.0.0 SEToolbox.ImageLibrary.dll
2018-10-20T09:21:44.0000000-04:00 7,680 1.0.0.0 SEToolbox.ImageShaders.dll
2018-10-20T09:21:50.0000000-04:00 2,248,192 SEToolbox.pdb
2018-10-20T09:21:44.0000000-04:00 53,248 1.0.0.0 SEToolboxUpdate.exe
2018-10-24T11:47:45.6942674-04:00 489,008 3.1.0 SharpDX.Direct2D1.dll
2018-10-24T11:47:45.6947665-04:00 288,304 3.1.0 SharpDX.Direct3D11.dll
2018-10-24T11:47:45.6962639-04:00 269,872 3.1.0 SharpDX.dll
2018-10-24T11:47:48.0878216-04:00 139,824 3.1.0 SharpDX.DXGI.dll
2018-10-24T11:47:45.6972621-04:00 456,240 1.0.0.0 SpaceEngineers.Game.dll
2018-10-24T11:47:48.1821466-04:00 60,464 1.0.0.0 SpaceEngineers.ObjectBuilders.dll
2018-10-24T11:47:45.6977612-04:00 4,559,408 1.0.0.0 SpaceEngineers.ObjectBuilders.XmlSerializers.dll
2018-10-24T11:47:45.6987591-04:00 329,264 11.0.0 Steamworks.NET.dll
2018-10-23T01:39:54.1707513-04:00 250,656 04.28.51.07 steam_api64.dll
2018-10-24T11:47:45.6992582-04:00 323,632 1.0.102.0 System.Data.SQLite.dll
2013-03-09T17:25:10.0000000-05:00 39,936 2.0.20525.0 System.Windows.Interactivity.dll
2018-10-24T11:47:48.1911299-04:00 24,112 1.0.0.0 VRage.Ansel.dll
2018-10-24T11:47:48.1931264-04:00 68,656 1.0.0.0 VRage.Audio.dll
2018-10-24T11:47:45.6997573-04:00 497,712 1.0.0.0 VRage.dll
2018-10-24T11:47:45.7002564-04:00 1,318,448 1.0.0.0 VRage.Game.dll
2018-10-24T11:47:45.7012550-04:00 7,095,344 1.0.0.0 VRage.Game.XmlSerializers.dll
2018-10-24T11:47:48.2021095-04:00 98,864 1.0.0.0 VRage.Input.dll
2018-10-24T11:47:45.7017535-04:00 726,576 1.0.0.0 VRage.Library.dll
2018-10-24T11:47:45.7027517-04:00 562,736 1.0.0.0 VRage.Math.dll
2018-10-24T11:47:48.3253817-04:00 190,512 VRage.Native.dll
2018-10-24T11:47:48.3578203-04:00 105,008 1.0.0.0 VRage.OpenVRWrapper.dll
2018-10-24T11:47:45.7032508-04:00 355,888 1.0.0.0 VRage.Render.dll
2018-10-24T11:47:45.7042487-04:00 1,002,544 1.0.0.0 VRage.Render11.dll
2018-03-27T15:51:20.0000000-04:00 77,824 3.0.1.0 WPFLocalizeExtension.dll
2018-01-08T20:35:48.0000000-05:00 27,648 1.2.2 XAMLMarkupExtensions.dll

System.NullReferenceException: Object reference not set to an instance of an object.
at Sandbox.Engine.Voxels.MyPlanetStorageProvider.Init(Int64 seed)
at Sandbox.Engine.Voxels.MyPlanetStorageProvider.Init(Int64 seed, MyPlanetGeneratorDefinition generator, Double radius)
at SEToolbox.Models.StructurePlanetModel.RegeneratePlanet(Int32 seed, Single radius) in D:\Development\GitHub\SEToolbox\Main\SEToolbox\SEToolbox\Models\StructurePlanetModel.cs:line 385
at SEToolbox.ViewModels.StructurePlanetViewModel.RegenerateExecuted() in D:\Development\GitHub\SEToolbox\Main\SEToolbox\SEToolbox\ViewModels\StructurePlanetViewModel.cs:line 185
at SEToolbox.Services.DelegateCommand.Execute() in D:\Development\GitHub\SEToolbox\Main\SEToolbox\SEToolbox\Services\DelegateCommand.cs:line 72
at SEToolbox.Services.DelegateCommand.System.Windows.Input.ICommand.Execute(Object parameter) in D:\Development\GitHub\SEToolbox\Main\SEToolbox\SEToolbox\Services\DelegateCommand.cs:line 154
at MS.Internal.Commands.CommandHelpers.CriticalExecuteCommandSource(ICommandSource commandSource, Boolean userInitiated)
at System.Windows.Controls.MenuItem.InvokeClickAfterRender(Object arg)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Start with SEToolbox.Models.StructurePlanetModel.RegeneratePlanet at line 385 and SEToolbox.ViewModels.StructurePlanetViewModel.RegenerateExecuted at line 185, then compare the preceding MyVoxelMap.Load failure for the custom planet. Reproduce regeneration with the reported custom planet and determine what completion should look like without the NullReferenceException or crash.