UBI Partman crashed (installation failed)

Hi, I don't know the code or name for the bug except for the notice that UBI Partman crashed. Was trying to install Ubuntu Studio on a desktop HP (32 system) from a DVD, overwriting Windows 7. Did run a check for faults on the DVD disk after downloading - the winme5sum was the same! - and again now when attempting installation.

Would be grateful for any assistance

Jon
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ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63.3
ProcVersionSignature: Ubuntu 4.8.0-36.36~16.04.1-lowlatency 4.8.11
Uname: Linux 4.8.0-36-lowlatency i686
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: i386
CasperVersion: 1.376.2
Date: Wed May 24 23:29:10 2017
InstallCmdLine: file=/cdrom/preseed/ubuntustudio.seed boot=casper only-ubiquity initrd=/casper/initrd.lz quiet splash ---
LiveMediaBuild: Ubuntu-Studio 16.04.2 LTS "Xenial Xerus" - Release i386 (20170215)
ProcEnviron:
 LANGUAGE=is_IS.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=is_IS.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)