pathfinder error

[zfy3000163]

When I execute the program pathfinder, I get the error shown in the screenshot below. What is the reason for this? Thanks!

[zfy3000163]

Do you have a prepared container image file?

[csehydrogen]

Hello,
TCCL currently only considers single-NIC systems, as it is specialized to find a single ring path.
For the "No rank available" error, the number of spawned MPI processes seems too small.
If the number of GPU in a system is 8, you need to spawn at least 19 (= 3 + 8 * 2) processes per node, on all 3 nodes.

[zfy3000163]

#1 (comment)
Thank you very much for your answer, it is very useful！

[Kelvin-Ng]

Is there a fundamental reason multi-NIC systems are not supported?

Do you have any suggestion on where to start if I would like to extend it to support multi-NIC?