An error

Error: Operation not supported

(Error code 3c0920)

Possible sources

This error originated from one of the following locations within the iPXE source code:

General advice

  • Try using the latest version of iPXE. Your problem may have already been fixed.
  • Try building iPXE with the debug option DEBUG=open
  • You can contact the iPXE developers and other iPXE users.
  • Refresh this page after 24 hours. This page is actively monitored, and further information may be added soon.

Additional notes

(Please edit this page to include any of your own useful hints and tips for fixing this error.)

This error usually indicates that you have tried to open a URI using a protocol that is not supported by your current build of iPXE. For example, if you try to boot from an ftp:// URI in an iPXE build without DOWNLOAD_PROTO_FTP enabled, then you will see this error.

You can see the list of supported protocols in the iPXE startup banner. For example, if the banner shows

  iPXE -- Open Source Network Boot Firmware --

then you can see that FTP is not supported by this build. (Supported protocols for this build include HTTP, iSCSI, and TFTP, but not FTP.)

Things to try:

err/3c0920.txt · Last modified: 2019/01/30 11:47 by
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