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No problem, and thanks for the reply. I did try without the flag but I get the same error. Is there a specific version of g++ that you recommend ?

@pjh5 Yes my cuda setup is working fine. The default compiler for Ubuntu 17 seems to be gcc-7. I am using gcc-6 because I read somewhere that cuda v9 required...

@anatlin @teaglin, I'm sorry, but some specifications changed in my project and I switched to using a different library instead of Caffe2 so I haven't had time to work on...