This error indicates that you have attempted to execute a [[:cmdline|command]] that iPXE does not recognise.

Things to try:

  * Ensure you've entered "kernel" before a line if you're executing a kernel.

  * Check the spelling of the command.

  * Check that the command exists in the [[:cmd|list of iPXE commands]].

  * Check that the command is enabled in your build of iPXE.  Some commands are not enabled by default.  For example, the ''[[:cmd:vcreate]]'' command, which creates a VLAN interface, is available only when the build option ''[[:buildcfg:VLAN_CMD]]'' is defined.