ENOCSI (errno 50)

errno 50

LINUX

No CSI structure available

Linux terminal running strace with the failing system call and errno highlighted
Linux errno: trace the exact failing system call before changing anything.

What it means

ENOCSI is a Linux error code reported by Linux and other POSIX systems. Its official message is: “No CSI structure available”

How to fix ENOCSI (errno 50)

  1. Reproduce with 'strace -f -e trace=<syscall> <cmd>' to see the exact failing call
  2. Confirm the errno with 'perror <code>' and correlate with 'dmesg' kernel messages
  3. Isolate the version — re-test on a clean shell or minimal container

Related errors

EUNATCH (errno 49)EL2HLT (errno 51)ELNRNG (errno 48)ENOMEM (errno 12)EACCES (errno 13)EBUSY (errno 16)EMFILE (errno 24)ENOSPC (errno 28)

Source: Linux kernel errno.h

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