error copy file fresh install

[Julius]

I follow the step after copying file then there are error box that this installer error when copying a file. It crash and make my installation stop, am using Flash disk on it

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.6
ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
Uname: Linux 4.15.0-29-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CasperVersion: 1.394
CurrentDesktop: ubuntu:GNOME
Date: Wed Dec 12 16:38:37 2018
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Paul White (paulw2u)]

We are sorry that we do not always have the capacity to review all reported bugs in a timely manner. The following messages can be found in UbiquitySyslog.txt which was automatically attached to this bug report:

Dec 12 09:33:32 ubuntu kernel: [ 11.355475] SQUASHFS error: zlib decompression failed, data probably corrupt
Dec 12 09:33:32 ubuntu kernel: [ 11.355478] SQUASHFS error: squashfs_read_data failed to read block 0xd0ff55f

You probably had a bad write to your media and no doubt the issue was resolved some time ago. Should you have such a problem in the future please try the option to check the integrity of the image from the installer boot menu, and if this confirms that the media is corrupt, try re-writing it.

Paul White
[Ubuntu Bug Squad]