lubuntu custamisation showing failed while using uck

Please help me to resolve this

showing this error in UCK
Building failed.

Build (/usr/bin/uck-gui --wait-before-exit) started at 2016-08-20 17:14:24
>> Ubuntu Customization Kit 2.4.7 on Ubuntu 14.04, 3.13.0-44-generic x86_64
Starting CD remastering on Sat Aug 20 17:14:27 IST 2016
Customization dir=/home/ubuntu/tmp/customization-scripts
Mounting ISO image...
mount: block device /home/ubuntu/Downloads/lubuntu_12.04_TC-backup.iso is write-protected, mounting read-only
Unpacking ISO image...
Unmounting ISO image...
Mounting SquashFS image...
mount: warning: /home/ubuntu/tmp/remaster-root-mount seems to be mounted read-only.
Unpacking SquashFS image...
Unmounting SquashFS image...
Creating apt cache...
Creating root home...
Mounting /proc
Mounting /sys
Mounting /dev/pts
Mounting /tmp
Mounting /home/ubuntu/tmp/remaster-root-home
Mounting /home/ubuntu/tmp/remaster-apt-cache
Mounting /run
Mounting /home/ubuntu/tmp/customization-scripts
Copying resolv.conf...
Copying fstab/mtab...
Creating DBUS uuid...
Creating user directory...
Copying X authorization file to chroot filesystem...
xauth: file /root/.Xauthority does not exist
Deactivating initctl...
Deactivating update-grub...
Deactivating grub-probe...
Hacking grub-probe postinst/postrm...
Remembering kernel update state...
>> Customizing: Ubuntu 12.04, 3.2.0-23-generic i586
Err http://archive.ubuntu.com precise Release.gpg
  Could not connect to 192.168.0.19:8080 (192.168.0.19), connection timed out
Err http://archive.ubuntu.com precise-updates Release.gpg
  Unable to connect to 192.168.0.19:8080:
Err http://archive.ubuntu.com precise-backports Release.gpg
  Unable to connect to 192.168.0.19:8080:
Reading package lists...
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/precise/Release.gpg Could not connect to 192.168.0.19:8080 (192.168.0.19), connection timed out

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/precise-updates/Release.gpg Unable to connect to 192.168.0.19:8080:

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/precise-backports/Release.gpg Unable to connect to 192.168.0.19:8080:

W: Some index files failed to download. They have been ignored, or old ones used instead.
Installing language packs (en
ml)...
Reading package lists...
Building dependency tree...
Reading state information...
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Removing unnecessary language packages...
Reading package lists...
Building dependency tree...
Reading state information...
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Please choose customization action
1) Run console application
2) Continue building
Your choice (1..2)> /tmp/customization-scripts/customize: line 144: [: Continue: binary operator expected
CHOICE='Continue building'
Done
Restoring kernel update state...
Reactivating initctl...
Reactivating update-grub...
Reactivating grub-probe...
Reactivating grub-probe postinst/postrm...
Removing /home/username directory...
Removing generated machine uuid...
Removing generated resolv.conf...
Removing generated fstab/mtab...
Removing crash reports...
Unmounting /home/ubuntu/tmp/remaster-root/var/cache/apt...
Unmounting /home/ubuntu/tmp/remaster-root/tmp/customization-scripts...
Unmounting /home/ubuntu/tmp/remaster-root/tmp...
Unmounting /home/ubuntu/tmp/remaster-root/sys...
Unmounting /home/ubuntu/tmp/remaster-root/run...
Unmounting /home/ubuntu/tmp/remaster-root/root...
Unmounting /home/ubuntu/tmp/remaster-root/proc...
Unmounting /home/ubuntu/tmp/remaster-root/dev/pts...
Cleaning up temporary directories...
Running ISO customization script /home/ubuntu/tmp/customization-scripts/customize_iso...
/home/ubuntu/tmp/customization-scripts/customize_iso: line 80: cd: /home/ubuntu/tmp/remaster-iso/dists: No such file or directory
Unable to identify Ubuntu distro codename