CUPTI, CUDA9.1 and sass_source_map example

I am running the CUPTI sass_source_map example under Win7/64, cuda 9.1, Titan Volta, and dev driver 388.59.
If you enable the DUMP_CUBIN symbol you will get the binary for the kernel. You can then use
nvdisasm to dump the sass.

I get the binary file. Then I type nvdisasm -b SM70 sass_source_map.cubin
I get an nvdisasm error. Unrecognized operation for functional unit ‘uC’ at address 0x00000000.

Can anyone help me diagnose this error?