Failed to load ldlinux.c32

[Salman17546]

I followed the below steps to make the ISO

1. Extract Linux Live Kit

   • Unpack the Linux Live Kit tarball into a directory (for example, /a/linux-live-2.12).

2. Configure the Build

   • Edit the configuration file:

     sudo nano /a/linux-live-2.12/config

   • Set the LIVEKITNAME (for example, change from "linux" to "software").
   • Ensure the kernel path is correct (for example, update VMLINUZ to /boot/vmlinuz-6.8.0-52-generic if needed).

3. Update the Bootloader Files for CD/DVD Booting

   • Change to the tools directory:

     cd /a/linux-live-2.12/tools

   • Run the isolinux update script:

     sudo ./isolinux.bin.update

   • When prompted for the boot directory, enter:

     /software/boot
     

4. Build the Live System

   • Return to the Linux Live Kit root directory:

     cd /a/linux-live-2.12

   • Run the build script to create the live system files:

     sudo ./build

   • The build process creates an intermediate directory (for example, /tmp/software-data-<timestamp>).

5. Generate the ISO

   • Run the ISO generation script:

     sudo /tmp/gen_software_iso.sh

but before this I added the allow-limited-size flag so that my ISO which is more than 4GB size can be made

• This creates the ISO (for example, /tmp/software-x86_64.iso).

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Troubleshooting the "Failed to Load ldlinux.c32" Error

Even after following the above steps, I saw the error “failed to load ldlinux.c32” when booting the ISO, here’s what was done to resolve it:

1. Replace ldlinux.c32 with the Official Ubuntu Version

   • Copy the Ubuntu-provided ldlinux.c32 into the ISO build directory:

     sudo cp /usr/lib/syslinux/modules/bios/ldlinux.c32 /tmp/software-data-<timestamp>/software/boot/ldlinux.c32

   • (Replace <timestamp> with your actual directory name.)

2. Ensure the Boot Configuration Uses Relative Paths

   • Copy syslinux.cfg to isolinux.cfg (if not already done):

     sudo cp /tmp/software-data-<timestamp>/software/boot/syslinux.cfg /tmp/software-data-<timestamp>/software/boot/isolinux.cfg

   • Edit the configuration file:

     sudo nano /tmp/software-data-<timestamp>/software/boot/isolinux.cfg

   • Modify the UI directive to use a relative path:
     • Change any line like:

       UI /software/boot/vesamenu.c32
       

       to:

       UI vesamenu.c32
       

   • Save and exit.

3. Rebuild the ISO

   • Regenerate the ISO with the updated build tree:

     sudo /tmp/gen_software_iso.sh

My kernel name was different as well so I changed that in config before running the sudo ./isolinux.bin.update and then I ran the build command. The syslinux.cfg had the kernel name as vmlinuz and not vmlinuz-generic-* like my kernel so I changed that as well as a fix but still the same error showed up.
Even after doing all of this my error is not resolved kindly help me out what I am doing wrong here
My Ubuntu version is:

Distributor ID: Ubuntu
Description: Ubuntu 24.04.1 LTS
Release: 24.04
Codename: noble

[Salman17546]

Solved this issue I just made sure that my LIVEKITNAME remains the same as default "linux" to avoid running that update script and it worked. But now I have ran into another issue which is Cannot Load Linux Data.....