Please do the following after the failed backup:
1. Press Advanced
2. Press Copy Log to SDCARD
3. Boot Android
4. Paste /sdcard/recovery.log to http://pastebin.org
5. Paste link here
I am having the same issue as Donjuanal with TWRP 22.214.171.124 and 126.96.36.199 and cannot backup any roms.
Here is the recovery log link: http://pastebin.com/1paUQWFJ
I'd like to find out about script to TWRP.
What I'd like to do is make a script or something that could be managed by Tasker to do scheduled nandroid backup.
For example, on the 1st of the month do a full backup called "Monthly 1" and another on the 15th called "Monthly 15" and have each overwrite the previous one.
|att, gui, note, twrp2, xml|