It seems that you are missing or not detecting the libHDDLPlugin.so file.
Can you check to see if the shared object file is available in
/opt/… …/inference_engine/lib/intel64 folder?
If not, could you manually extract the file from the rpm file?
Are you running on local machine, virtual machine, or Intel DevCloud? Can you share your environment details (processor, OS, etc.)?
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