For the benifit of the thread readers, I am posting excerpt from my PM response below:
There's not much to go on since the songsInfo.xml file is missing from the CFSM folder.
From the debug.log file:
[2017.10.06 13.48.43]: Parsing archives from F:\
redacted\Steam\steamapps\common\Rocksmith2014\dlc took: 38549 (msec)
[2017.10.06 13.49.19]: User aborted deleting CFSM folder and subfolders from My Documents ...
Here's what I would try:
1) Rename the F:\
redacted\Steam\steamapps\common\Rocksmith2014\dlc folder to 'dlc_backup'
2) Create a new empty 'dlc' folder and copy only one known good oDLC psarc into the 'dlc' folder for testing.
3) Restart CFSM. You should answer yes and allow CFSM to delete the working folders from My Documents if asked.
4) Select the new 'dlc' folder that has only one oDLC inside (if asked) and see if CFSM runs as expected.
If this works then try coping all oDLC and CDLC over from the F:\
redacted\Steam\steamapps\common\Rocksmith2014\dlc_backup folder back to the clean 'dlc' folder.
If CFSM throws the same error then you may have a corrupt CDLC that is causing the issue. You will have to hunt and find (quarantine) to fix if this is the case. As you pointed out some of your file naming is dubious. As an example, '[2017.10.06 13.48.38]: - The Cranberries - Zombie (3 Distinct Guitar Parts) L = Dolores R = Hogan clean BR = Hogan dist_v1_p.psarc'