installer crashes while installing customized 16.04

[Ranjan]

I have customized ubuntu and while installing it I can see the installer crashes in midway. Can you please help me to fix the issue.

ALso can you please let me know the steps to create customized .iso. I used respin to create an .iso image.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63.3 [modified: usr/share/ubiquity/apt-setup]
ProcVersionSignature: Ubuntu 4.8.0-36.36~16.04.1-generic 4.8.11
Uname: Linux 4.8.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CasperVersion: 1.376.2
Date: Thu Feb 16 14:49:55 2017
JournalErrors:
 Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
       Users in the 'systemd-journal' group can see all messages. Pass -q to
       turn off this notice.
 No journal files were opened due to insufficient permissions.
LiveMediaBuild: Custom 16.04 - Release amd64
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(username, no user)
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: ubiquity
UbiquitySyslog:

UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

We can't support custom images here.