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"Unable to initialize python raster function with scalar arguments" on an NVIDIA machine

Question asked by aevenpaz_Cadasta on Jul 10, 2020
Latest reply on Jul 27, 2020 by s.kumar-esristaff

I am trying to run a notebook given to me by Esri Support staff (case #02587809) and when I try to run the arcpy.ia.DetectObjectsUsingDeepLearning function I recieve the following error message:

Line 1:     arcpy.ia.DetectObjectsUsingDeepLearning(imagery, r"C:\Users\Administrator\Documents\ArcGIS\Projects\Haiti_AI\Haiti_AI.gdb\bldg_detected_jupyterGPU_10July2020", r"D:\TrainingData\MaskRCNN_chips\models\Building_footprint_40epochsGPU\Building_footprint_40epochsGPU.emd", "padding 64;batch_size 4;threshold 0.9;return_bboxes False", "NO_NMS", "Confidence", "Class", 0, "PROCESS_AS_MOSAICKED_IMAGE")  File c:\program files\arcgis\pro\Resources\arcpy\arcpy\ia\, in DetectObjectsUsingDeepLearning: Line 2888:  processing_mode)  File c:\program files\arcgis\pro\Resources\arcpy\arcpy\sa\, in swapper: Line 53:    result = wrapper(*args, **kwargs)  File c:\program files\arcgis\pro\Resources\arcpy\arcpy\ia\, in Wrapper: Line 2877:  processing_mode)  File c:\program files\arcgis\pro\Resources\arcpy\arcpy\geoprocessing\, in <lambda>: Line 511:   return lambda *args: val(*gp_fixargs(args, True)) ExecuteError: ERROR 999999: Something unexpected caused the tool to fail. Contact Esri Technical Support ( to Report a Bug, and refer to the error help for potential solutions or workarounds. Unable to initialize python raster function with scalar arguments. [D:\TrainingData\MaskRCNN_chips\models\Building_footprint_40epochsGPU\] Traceback (most recent call last):   File "D:\TrainingData\MaskRCNN_chips\models\Building_footprint_40epochsGPU\", line 169, in initialize     self.child_instance_detector.initialize(model, model_as_file)   File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-py3\lib\site-packages\arcgis\learn\models\_inferencing\", line 158, in initialize     self.mask_rcnn = MaskRCNN.from_model(emd_path=model)   File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-py3\lib\site-packages\arcgis\learn\models\", line 215, in from_model     data = _EmptyData(path=emd_path.parent.parent, loss_func=None, c=len(class_mapping) + 1, chip_size=emd['ImageHeight'])   File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-py3\lib\site-packages\arcgis\learn\models\", line 60, in __init__     if getattr(arcgis.env, "_processorType", "") == "GPU" and torch.cuda.is_available(): NameError: name 'torch' is not defined Unable to initialize python raster function with scalar arguments. Failed to execute (DetectObjectsUsingDeepLearning).

I have tried various workarounds from similar threads but nothing so far. I am using a g3s.xlarge machine and remote desktop (windows machine) with GPU enabled.
I have verified that the GPU is being used by running:

print ("GPU-Device: "+str(cudaDevice))
print ("GPU-Device-Info: "+str(torch.cuda.device(cudaDevice)))
print ("GPU-Device-Count: "+str(torch.cuda.device_count()))
print ("GPU-Device-Name: "+str(torch.cuda.get_device_name(cudaDevice)))
print ("GPU-Device-Availability: "+str(torch.cuda.is_available()))
#now some more info
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
print('Using device:', device)
#Additional Info when using cuda
if device.type == 'cuda':
print('Memory Usage:')
print('Allocated:', round(torch.cuda.memory_allocated(0)/1024**3,1), 'GB')
print('Cached: ', round(torch.cuda.memory_cached(0)/1024**3,1), 'GB')

# use this to test: Run code, dont close,
# go to OS and run nvidia-smi to see process runs on GPU
print (torch.rand(3,3).cuda())
with open(r'c:/temp/log.txt', 'r') as f:


Resulting in:


GPU-Device: 0 GPU-Device-Info: <torch.cuda.device object at 0x000002B5B5DCD390> GPU-Device-Count: 1 GPU-Device-Name: Tesla M60 GPU-Device-Availability: True Using device: cuda  Tesla M60 Memory Usage: Allocated: 0.0 GB Cached:    0.0 GB tensor([[0.3166, 0.1292, 0.2083],         [0.2514, 0.0501, 0.4692],         [0.8568, 0.1868, 0.6476]], device='cuda:0')

Any thoughts?