Software

Podman Error: "Failed to open() /dev/net/tun: No such device"

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.

STAR-CCM+ OpenMPI Job Failed due to Out-of-Memory

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.

starccm does not use vis node GPU

Issue:

When trying to run starccm on a vis node in order to use GPU for visualization (not for GPU calculation), the typical way to do this would be to load the virtualgl module and use vglrun

module load virtualgl/3.1.1
module load starccm/19.06.009
vglrun starccm+

However, starccm does not pick up libraries from $LD_LIBRARY_PATH by default, so it does not pick up the necessary graphics libraries

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