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Return Codes from dispatcherEventReceive()

Hi there,

Just wondering what the return codes signify in the dispatcherEventReceive function. Currently, I can load a graph file generated using the mvNCCompile tool, but calling the allocate_with_fifos function causes the script to hang after returning the message:

dispatcherEventReceive() Read failed -4

Using 2.05.00.02 of the NCSDK, in a Virtual Box environment running Ubuntu 18.04. The hello_ncs.py sample works fine, as do other examples

Many thanks..

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