doc/bugs/Unable_to_add_files_on_Android_due_to_weird_rename_error.mdwn

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+### Please describe the problem.
+
+I am receiving a weird error when trying to add a file into a git annex repo on Android. I can't explain how it got into this state, and I can't figure out how to fix it.
+
+### What steps will reproduce the problem?
+
+See the output below - I'm happy to run any debugging commands that are required.
+
+### What version of git-annex are you using? On what operating system?
+
+ASUS Transformer Infinity Android Tablet, Android 4.2.1.
+
+[[!format sh """
+git-annex version: 4.20130601-g7483ca4
+build flags: Assistant Webapp Testsuite S3 WebDAV Inotify XMPP DNS
+local repository version: 3
+default repository version: 3
+supported repository versions: 3 4
+upgrade supported from repository versions: 0 1 2
+"""]]
+
+
+### Please provide any additional information below.
+
+[[!format sh """
+u0_a141@android:/sdcard/git-annex.home/Documents $ git annex add Music/MobileSheets/The\ New\ Real\ Book\ 1/New\ Real\ Book\ 1\ Eb_19.pdf
+add Music/MobileSheets/The New Real Book 1/New Real Book 1 Eb_19.pdf (checksum...) unknown option -- reflink=auto
+git-annex: /storage/emulated/legacy/git-annex.home/Documents/.git/annex/tmp/New Real Book 1 Eb15137.pdf: rename: does not exist (No such file or directory)
+failed
+git-annex: add: 1 failed
+1|u0_a141@android:/sdcard/git-annex.home/Documents $ ls -la .git/annex/tmp/
+drwxrwxr-x    2 root     sdcard_r      4096 Jun 14 13:42 .
+drwxrwxr-x    6 root     sdcard_r      4096 Jun 14 13:35 ..
+u0_a141@android:/sdcard/git-annex.home/Documents $
+"""]]