Software

Users may experience the following error when running Podman or Docker:

Error: pasta failed with exit code 1:
Failed to open() /dev/net/tun: No such device
Failed to set up tap device in namespace

This error is caused by our recent security mitigation that blocks the tun kernel module to protect against a Linux vulnerability. Once RHEL releases an official patch, this issue will be fully resolved.

We have identified a potential performance regression in point-to-point communication when using NCCL version 2.29 on the Ascend and Pitzer clusters, which results in a 15% to 25% performance drop.

Workaround

If you experience performance regression on Pitzer or Ascend, please switch to NCCL version 2.23.4.

After the scheduled downtime on May 12, 2026, STAR-CCM+ has been encountering out-of-memory errors when running OpenMPI jobs. A message similar to the following appears repeatedly in the output:

[c0317.ten.osc.edu:1736021] Read -1, expected 133860, errno = 1

We have not yet identified the root cause of the issue; however, we have discovered that this error does not occur in multi-node jobs.

autodock-gpu/1.5.2 does not work on Cardinal. We suggest using autodock-gpu/1.6 instead