Object reference not set

[Panabou]

(EDIT: This was with version 0.4.2, I will try the recent version. EDIT2: There is no 0.4.4 Windows installer yet.)
Hello, if I can load a new model (e.g. the 2 GB StableDiffusionXL model) I get the following error after I Press "Generate":

2026-01-26 13:34:35.672 +01:00 [INF] [StartAsync] Starting Pipeline server...
2026-01-26 13:34:35.725 +01:00 [INF] [PipelineServer] [WaitForConnection] Waiting for connection...
2026-01-26 13:34:35.726 +01:00 [INF] [PipelineServer] [WaitForConnection] Client connected.
2026-01-26 13:34:35.727 +01:00 [INF] [PipelineServer] [ProgressChannel] Start progress channel.
2026-01-26 13:34:35.781 +01:00 [INF] [PipelineServer] [CommandChannel] Start command channel.
2026-01-26 13:34:35.781 +01:00 [INF] [PipelineServer] [CommandChannel] Waiting for command...
2026-01-26 13:34:35.785 +01:00 [INF] [PipelineServer] [PipelineChannel] Start pipeline channel.
2026-01-26 13:34:35.786 +01:00 [INF] [PipelineServer] [PipelineChannel] Waiting for request.
2026-01-26 13:34:35.871 +01:00 [INF] [PipelineServer] [PipelineChannel] Start request received.
2026-01-26 13:34:35.875 +01:00 [INF] [PipelineServer] [StartServer] Server started.
2026-01-26 13:34:35.875 +01:00 [INF] [PipelineServer] [PipelineChannel] Waiting for request.
2026-01-26 13:34:35.877 +01:00 [INF] [PipelineServer] [PipelineChannel] Environment request received.
2026-01-26 13:34:35.909 +01:00 [DBG] Adding environment site-packages to extra paths: C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines.default-cuda\Lib\site-packages
2026-01-26 13:34:35.912 +01:00 [DBG] Virtual environment already exists at C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines.default-cuda
2026-01-26 13:34:35.912 +01:00 [DBG] Setting up Python environment from C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Python using home of C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines
2026-01-26 13:34:35.912 +01:00 [DBG] Python DLL: C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Python\python312.dll
2026-01-26 13:34:35.912 +01:00 [DBG] Python path: C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Python\Lib;C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Python\DLLs
2026-01-26 13:34:35.913 +01:00 [DBG] Adding extra paths to PYTHONPATH: C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines.default-cuda\Lib\site-packages
2026-01-26 13:34:36.212 +01:00 [INF] [PipelineServer] [PipelineChannel] Waiting for request.
2026-01-26 13:34:36.216 +01:00 [INF] [PipelineServer] [PipelineChannel] PipelineLoad request received.
2026-01-26 13:34:36.217 +01:00 [INF] [PythonPipeline] [ReloadModule] Importing pipeline module 'StableDiffusionXLPipeline'.
2026-01-26 13:34:53.712 +01:00 [INF] [PythonPipeline] [Load] Loading pipeline.
2026-01-26 13:34:54.522 +01:00 [INF] [PythonPipeline] [PythonRuntime] Loading pipeline components...
2026-01-26 13:34:54.797 +01:00 [INF] [PythonPipeline] [PythonRuntime] Loading pipeline components...
2026-01-26 13:34:55.049 +01:00 [INF] [PythonPipeline] [PythonRuntime] Loading pipeline components...
2026-01-26 13:34:56.818 +01:00 [INF] [PythonPipeline] [PythonRuntime] [Quantize] OffloadCPU does not support quantization.
2026-01-26 13:35:02.636 +01:00 [ERR] [PythonPipeline] [PythonRuntime] MemoryError exception occurred
CSnakes.Runtime.PythonRuntimeException
File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines\StableDiffusionXLPipeline.py", line 50, in load
_pipeline = create_pipeline(config)
^^^^^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines\StableDiffusionXLPipeline.py", line 206, in create_pipeline
unet = load_unet(config, pipeline_config, quant_config_diffusers, pipeline_kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines\StableDiffusionXLPipeline.py", line 285, in load_unet
return UNet2DConditionModel.from_pretrained(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines.default-cuda\Lib\site-packages\huggingface_hub\utils_validators.py", line 114, in _inner_fn
return fn(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines.default-cuda\Lib\site-packages\diffusers\models\modeling_utils.py", line 1268, in from_pretrained
state_dict = load_state_dict(resolved_model_file[0], disable_mmap=disable_mmap, dduf_entries=dduf_entries)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines.default-cuda\Lib\site-packages\diffusers\models\model_loading_utils.py", line 196, in load_state_dict
if f.read().startswith("version"):
^^^^^^^^

2026-01-26 13:35:02.695 +01:00 [ERR] File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines\StableDiffusionXLPipeline.py", line 50, in load
_pipeline = create_pipeline(config)
^^^^^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines\StableDiffusionXLPipeline.py", line 206, in create_pipeline
unet = load_unet(config, pipeline_config, quant_config_diffusers, pipeline_kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines\StableDiffusionXLPipeline.py", line 285, in load_unet
return UNet2DConditionModel.from_pretrained(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines.default-cuda\Lib\site-packages\huggingface_hub\utils_validators.py", line 114, in _inner_fn
return fn(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines.default-cuda\Lib\site-packages\diffusers\models\modeling_utils.py", line 1268, in from_pretrained
state_dict = load_state_dict(resolved_model_file[0], disable_mmap=disable_mmap, dduf_entries=dduf_entries)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines.default-cuda\Lib\site-packages\diffusers\models\model_loading_utils.py", line 196, in load_state_dict
if f.read().startswith("version"):
^^^^^^^^

2026-01-26 13:35:02.697 +01:00 [ERR] [PipelineServer] [LoadPipeline] An exception occurred loading pipeline.
System.Exception
---> CSnakes.Runtime.PythonRuntimeException
File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines\StableDiffusionXLPipeline.py", line 50, in load
_pipeline = create_pipeline(config)
^^^^^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines\StableDiffusionXLPipeline.py", line 206, in create_pipeline
unet = load_unet(config, pipeline_config, quant_config_diffusers, pipeline_kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines\StableDiffusionXLPipeline.py", line 285, in load_unet
return UNet2DConditionModel.from_pretrained(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines.default-cuda\Lib\site-packages\huggingface_hub\utils_validators.py", line 114, in _inner_fn
return fn(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines.default-cuda\Lib\site-packages\diffusers\models\modeling_utils.py", line 1268, in from_pretrained
state_dict = load_state_dict(resolved_model_file[0], disable_mmap=disable_mmap, dduf_entries=dduf_entries)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "C:\Users\x\AppData\Local\Diffuse\PythonRuntime\Pipelines.default-cuda\Lib\site-packages\diffusers\models\model_loading_utils.py", line 196, in load_state_dict
if f.read().startswith("version"):
^^^^^^^^

--- End of inner exception stack trace ---
at TensorStack.Python.PythonPipeline.b__15_0()
at System.Threading.Tasks.Task1.InnerInvoke() at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) --- End of stack trace from previous location --- at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread) --- End of stack trace from previous location --- at DiffuseApp.Common.PipelineServer.LoadPipelineAsync(PipelineRequest request, CancellationToken cancellationToken) 2026-01-26 13:35:02.725 +01:00 [INF] [PipelineServer] [PipelineChannel] Waiting for request. 2026-01-26 13:35:19.095 +01:00 [INF] [PipelineServer] [PipelineChannel] PipelineRun request received. 2026-01-26 13:35:19.096 +01:00 [ERR] [PipelineServer] [RunPipeline] An exception occurred running pipeline. System.NullReferenceException: Object reference not set to an instance of an object. at DiffuseApp.Common.PipelineServer.RunPipelineAsync(PipelineRequest request, PythonPipeline pipeline, CancellationToken cancellationToken) 2026-01-26 13:35:19.097 +01:00 [INF] [PipelineServer] [PipelineChannel] Waiting for request. 2026-01-26 13:40:27.215 +01:00 [INF] [PipelineServer] [PipelineChannel] PipelineUnload request received. 2026-01-26 13:40:27.216 +01:00 [ERR] [PipelineServer] [UnloadPipeline] An exception occurred unloading pipeline. System.NullReferenceException: Object reference not set to an instance of an object. at DiffuseApp.Common.PipelineServer.UnloadPipelineAsync(PipelineRequest request, PythonPipeline pipeline, CancellationToken cancellationToken) 2026-01-26 13:40:27.216 +01:00 [INF] [PipelineServer] [PipelineChannel] Waiting for request. 2026-01-26 13:40:27.218 +01:00 [INF] [PipelineServer] [PipelineChannel] Pipeline channel closed. 2026-01-26 13:40:27.219 +01:00 [ERR] [PipelineServer] [CommandChannel] - An exception occurred receiving command. System.IO.EndOfStreamException: Unable to read beyond the end of the stream. at System.IO.Stream.ReadAtLeastAsyncCore(Memory1 buffer, Int32 minimumBytes, Boolean throwOnEndOfStream, CancellationToken cancellationToken)
at System.Runtime.CompilerServices.PoolingAsyncValueTaskMethodBuilder1.StateMachineBox1.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
at DiffuseApp.Common.Extensions.ReceiveObject[T](PipeStream pipe, CancellationToken cancellationToken)
at DiffuseApp.Common.PipelineServer.StartCommandChannelAsync(CancellationToken cancellationToken)
2026-01-26 13:40:27.219 +01:00 [INF] [PipelineServer] [Start] Generate loop stopped.
2026-01-26 13:40:27.221 +01:00 [INF] [StartAsync] Pipeline server stopped.

The new entries in the Diffuse Log:

2026-01-26 13:40:27.205 +01:00 [INF] [TextToImageView] [LoadPipelineAsync] - Loading pipeline...
2026-01-26 13:40:46.077 +01:00 [INF] [TextToImageView] [LoadPipelineAsync] - Loading pipeline complete.
2026-01-26 13:40:46.078 +01:00 [INF] [TextToImageView] [LoadPipelineAsync] - Elapsed: 00:00:18.8726791
2026-01-26 13:40:58.450 +01:00 [INF] [TextToImageView] [ExecuteAsync] - Executing pipeline..
2026-01-26 13:40:58.467 +01:00 [ERR] [TextToImageView] [ExecuteAsync] - An exception occurred executing pipeline.
System.Exception: Object reference not set to an instance of an object.
at DiffuseApp.Common.PipelineClient.SendPipelineRequestAsync(PipelineRequest request, CancellationToken cancellationToken)
at DiffuseApp.Common.PipelineClient.RunAsync(PipelineOptions options)
at Diffuse.Services.DiffusionService.GenerateImageAsync(DiffusionInputOptions options)
at Diffuse.Views.TextToImageView.ExecuteAsync()
2026-01-26 13:41:01.912 +01:00 [INF] [TextToImageView] [ExecuteAsync] - Elapsed: 00:00:03.4618410