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Community Manager

Error when allocating another Graph

I'm running Movidius in a loop with several Graphs.


The first graph runs normally and after that it's deallocated.


When the second loop starts running and when the code tries to allocate


the second graph, an error occurs. I've tried to close and reopen the


device, but didn't work anyway.


Traceback (most recent call last):


File "/home/joaoreiser/Documentos/UFSC/Dissertação/Arquivos_Testes_Python/Time_2/", line 33, in


graph = device.AllocateGraph(graphfile)


File "/usr/local/lib/python3.5/dist-packages/mvnc/", line 203, in AllocateGraph


raise Exception(Status(status))


Exception: mvncStatus.ERROR


Traceback (most recent call last):


File "/home/joaoreiser/Documentos/UFSC/Dissertação/Arquivos_Testes_Python/Time_2/", line 32, in




File "/usr/local/lib/python3.5/dist-packages/mvnc/", line 147, in OpenDevice


raise Exception(Status(status))


Exception: mvncStatus.ERROR


Is there anyway of change the graph during the code execution?


The piece of code where the Movidius is used:


with open(fl, mode='rb') as f: graphfile = device = mvnc.Device(devices[0]) device.OpenDevice() graph = device.AllocateGraph(graphfile) print('Download to NCS') for i in range(20): graph.LoadTensor(data.astype(np.float16), 'inf') output, userobj = graph.GetResult() graph.DeallocateGraph() device.CloseDevice()



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1 Reply
Community Manager

Hi @joaoreiser


First, is it possible to have the full code (the two loops)


Second, after the first loop, do you only deallocate the graph or also close the device?


Indeed, the Traceback point to the OpenDevice function which means that maybe it is already open…


There is no need to recreate a device and so on.


Basically I already created a loop doing like so:


create_device open_device start_loop: allocate graph load_tensor get_result deallocate_graph allocate_graph_2 load_tensor get_result_2 deallocate_graph


So it should work in your case too.


Hope it helped