This error indicates that you have attempted to retrieve a non-existent setting.

Things to try:

• If you are using the show command in an iPXE script to display the value of a setting, consider using the echo command instead. For example:

    #!ipxe
    
    dhcp
    echo IP address: ${net0/ip}

  You may also want to use the isset command. For example:

    #!ipxe
    
    dhcp
    isset ${net0/ip} && echo IP address: ${net0/ip} || echo No IP address