For reference, here is the output that was attached to Bug #1827157. It looks like the issue is near /usr/share/cubic/utilities.py", line 2089, in create_kernel_details_list, where an argument must be str or bytes, not 'NoneType'. ---------------------------------------------------- Just updated and tried to update my existing project. When I click Next out of Chroot, cubic hung forever. Quit and then ran again from Terminal to see if anything was logged and ran into the same hang. Here is the relevant output: Create kernel details list Get vmlinuz version details Get vmlinuz version from file name..... /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/squashfs- root/boot/vmlinuz-4.15.0-48-generic The vmlinuz version is................. 4.15.0-48 Search kernel details list for matching version • Kernel version....................... 4.15.0-48 • Kernel version as integers........... (4, 15, 0, 48) • Vmlinuz filename..................... vmlinuz-4.15.0-48-generic • Directory............................ /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/squashfs- root/boot • Matching kernel version found?....... No Add new kernel details • Index................................ 0 of 0 • Kernel version....................... 4.15.0-48 • Kernel version as integers........... (4, 15, 0, 48) • Vmlinuz filename..................... vmlinuz-4.15.0-48-generic • Initrd filename...................... None • Directory............................ /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/squashfs- root/boot Get initrd version details Get initrd version from file name...... /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/squashfs-root/ boot/initrd.img-4.15.0-20-generic The initrd version is.................. 4.15.0-20 Search kernel details list for matching version • Kernel version....................... 4.15.0-20 • Kernel version as integers........... (4, 15, 0, 20) • Initrd filename...................... initrd.img-4.15.0-20-generic • Directory............................ /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/squashfs- root/boot • Matching kernel version found?....... No Add new kernel details • Index................................ 1 of 1 • Kernel version....................... 4.15.0-20 • Kernel version as integers........... (4, 15, 0, 20) • Vmlinuz filename..................... None • Initrd filename...................... initrd.img-4.15.0-20-generic • Directory............................ /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/squashfs- root/boot Get initrd version details Get initrd version from file name...... /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/squashfs-root/ boot/initrd.img-4.15.0-48-generic The initrd version is.................. 4.15.0-48 Search kernel details list for matching version • Kernel version....................... 4.15.0-48 • Kernel version as integers........... (4, 15, 0, 48) • Initrd filename...................... initrd.img-4.15.0-48-generic • Directory............................ /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/squashfs- root/boot • Matching kernel version found?....... Yes • Index of match....................... 0 of 1 Update kernel details • Index................................ 0 of 1 • Kernel version....................... 4.15.0-48 • Kernel version as integers........... (4, 15, 0, 48) • Vmlinuz filename..................... vmlinuz-4.15.0-48-generic • Initrd filename...................... initrd.img-4.15.0-48-generic • Directory............................ /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/squashfs- root/boot Get vmlinuz version details Get vmlinuz version from file name..... /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/original-iso- mount/casper/vmlinuz Get vmlinuz version from file type..... /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/original-iso- mount/casper/vmlinuz Execute synchronously.................. file "/home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/original-iso- mount/casper/vmlinuz" Found version.......................... 4.15.0-20 The vmlinuz version is................. 4.15.0-20 Search kernel details list for matching version • Kernel version....................... 4.15.0-20 • Kernel version as integers........... (4, 15, 0, 20) • Vmlinuz filename..................... vmlinuz • Directory............................ /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/original-iso- mount/casper • Matching kernel version found?....... No Add new kernel details • Index................................ 2 of 2 • Kernel version....................... 4.15.0-20 • Kernel version as integers........... (4, 15, 0, 20) • Vmlinuz filename..................... vmlinuz • Initrd filename...................... None • Directory............................ /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/original-iso- mount/casper Get initrd version details Get initrd version from file name...... /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/original-iso- mount/casper/initrd.lz Get initrd version from file contents............................... /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/original-iso- mount/casper/initrd.lz The initrd version is.................. 0.0.0-0 Search kernel details list for matching version • Kernel version....................... 0.0.0-0 • Kernel version as integers........... (0, 0, 0, 0) • Initrd filename...................... initrd.lz • Directory............................ /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/original-iso- mount/casper • Matching kernel version found?....... No Add new kernel details • Index................................ 3 of 3 • Kernel version....................... 0.0.0-0 • Kernel version as integers........... (0, 0, 0, 0) • Vmlinuz filename..................... None • Initrd filename...................... initrd.lz • Directory............................ /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/original-iso- mount/casper Execute synchronously.................. file "/home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/squashfs-root/boot/initrd.im g-4.15.0-48-generic" The file type informaton is............ /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/squashfs-root/ boot/initrd.img-4.15.0-48-generic: ASCII cpio archive (SVR4 with no CRC) Compression for initrd not found in.... /home/pico/Documents/Linux Mint 19.1 Cinnamon with Updates/squashfs-root/ boot/initrd.img-4.15.0-48-generic The compression for initrd is.......... None Exception encountered in thread........ 140115640833792 Ignore exception?...................... No The tracekback is...................... Traceback (most recent call last): File "/usr/share/cubic/transition.py", line 93, in run self.action() File "/usr/share/cubic/transition.py", line 398, in action self) File "/usr/share/cubic/transitions.py", line 1921, in transition__from__term inal_page__to__options_page _tra nsition__from__unknown_page__to__opt ions_page('terminal_page', thread) File "/usr/share/cubic/transitions.py", line 1102, in _transition__from__unk nown_page__to__options_page directory_2) File "/usr/share/cubic/utilities.py", line 2089, in create_kernel_details_list initrd_filepath = os.path.join(directory, initrd_filename) File "/usr/lib/python3.6/posixpath.py", line 94, in join genericpath._check_arg_types('join', a, *p) File "/usr/lib/python3.6/genericpath.py", line 149, in _check_arg_types (funcname, s.__class__.__name__)) from None TypeError: join() argument must be str or bytes, not 'NoneType' Finished running thread with id........ 140115640833792