OK this is all resolved. I fixed the above error by reinstalling the SGX driver. I had previously installed `sgx_linux_x64_driver_1.33.bin` which I think is mainly for DCAP, rather than IAS. After installing the `sgx_linux_x64_driver_2.6.0_95eaa6f.bin` driver and reinstalling the SDK, all of the example programs in `/opt/sgxsdk` including remote attestation work fine. Thank you both for your help debugging and suggestions to narrow in on the problem.
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