Can't install error installing grub-PC

[camilo covaria]

When i install lubuntu 16.10, the install process continued normally but at the grub installation this error appeared : grub-pc failed to install into /target/

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: ubiquity 16.10.14 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
Uname: Linux 4.8.0-22-generic i686
ApportVersion: 2.20.3-0ubuntu8
Architecture: i386
CasperVersion: 1.379
Date: Thu Apr 6 14:59:13 2017
InstallCmdLine: file=/cdrom/preseed/lubuntu.seed boot=casper only-ubiquity cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid initrd=/casper/initrd.lz quiet splash --- BOOT_IMAGE=/casper/vmlinuz
LiveMediaBuild: Lubuntu 16.10 "Yakkety Yak" - Release i386 (20161012.1)
ProcEnviron:
 LANGUAGE=es_CO.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=es_CO.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[camilo covaria (camicov)]

I was installing with ethernet i didn´t work until i figured out to do it with a wifi adapter.

tx