Sounds vaguely like the seemingly endless nested appdata stuff you get if you 
try to remotely recurse a directory tree.  I believe it's created by a 
link/junction which gets reparsed incorrectly.  Oddly enough it doesn't show up 
if you do the same thing locally.

You might try moving the offending folder elsewhere on the drive to see if 
that's really the culprit or just a false alarm.

--
There are 10 kinds of people in the world...
         those who understand binary and those who don't.

From: [email protected] [mailto:[email protected]] On 
Behalf Of Neil Standley
Sent: Wednesday, June 1, 2016 1:13 PM
To: [email protected]
Subject: [NTSysADM] Windows 10 upgrade issue

I have a client attempting to upgrade 8.1 to 10, but it is failing with the 
error 0x8007002C - 0x4000D. The installation failed in the second_boot phase 
with an error during migrate_data operation.


The setuperr log seems to indicate the issue is thousands of nested folders 
under C:\Users\username\AppData\Local\Microsoft\Windows Mail\migbackup\ which 
creates a path more than 260 characters long and the upgrade is choking on it.

016-05-26 00:21:03, Error                 SP     Error WRITE, 0x000000CE while 
gathering/applying object: File, 
C:\Users\username\AppData\Local\Microsoft\Windows 
Mail\migbackup\migbackup\migbackup\migbackup\migbackup\......
When I copy the whole error message from the log in to Word and do a word count 
it shows 1627 instances of "migbackup".

Has anyone seen or heard of this before?

My Technet and Google searches are returning useless results.


Thanks,
Neil

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