Loading big stl file (100mb) leads to no result

Hi, I’m using the hdx:Viewport3DX to display stl files in my WPF application. This is working fine for normal stl files (a few mb big). However once I try to display a bigger file, the Importer gets back null for the result.

This is how I read the file.

private async Task<bool> read3dFile(string path)
        {
            if (path == null)
            {
                return false;
            }
            IsLoadingStl = true;
            bool succeeded = false;
            await Task.Run(() =>
            {
                var loader = new Importer();
                return loader.Load(path, new ImporterConfiguration()
                {
                    EnableParallelProcessing = true,
                });
            }).ContinueWith((result) =>
            {
                if (result.IsCompleted)
                {
                    scene = result.Result;
                    GroupModel.Clear();
                    if (scene != null)
                    {
                        GroupModel.AddNode(scene.Root);
                        succeeded = true;
                    }
                }
                else if (result.IsFaulted && result.Exception != null)
                {
                    MessageBox.Show(result.Exception.Message);
                }
                IsLoadingStl = false;
            }, TaskScheduler.FromCurrentSynchronizationContext());
            Messenger.Default.Send(new NotificationMessage(null, "ZoomToFitStl"));
            IsLoadingStl = false;
            return succeeded;
        }

the result.IsComplete is true, however the result.Result is null. I tried to read the file below: https://www.thingiverse.com/thing:2506681

Thank you!

[holance]

Seems like you are loading the same file twice. Once using the IxMilia to create a STL object. Then try to use assimp to load again. Maybe the file is locked for reading by IxMilia library, then you try to read the file again using assimp, and failed. I comment out Model = Load(StlFilePath); in Stl.cs constructor and it is working now.

[AndreasReitberger]

It seems to be assimp to internal issue.

Is there something I can do to fix this? Thanks for looking into this matter.