i played with linux customization and when i want to build the iso back i get this error:

$ mkisofs -r -o rhel.iso -b isolinux/isolinux.bin -c isolinux/boot.cat ./
INFO: UTF-8 character encoding detected by locale settings.
Assuming UTF-8 encoded filenames on source filesystem,
use -input-charset to override.
Unknown file type (unallocated) ./.. - ignoring and continuing.
Using RELEA000.HTM;1 for /RELEASE-NOTES-pt_BR.html (RELEASE-NOTES-U1-pt_BR.html)

Size of boot image is 20 sectors -> mkisofs: Error - boot image './isolinux/isolinux.bin' has not an allowable size.

i didnt change the isolinux.bin why i ahve this error?