adupdate fails missing next.trk

[László Sándor]

Hi,
I am using an up-to-date Stata 13.1 for Windows, but -adoupdate- got stuck, as shown below. What is this about? What is there to do? Thanks!
Laszlo

. cd c:\ado\plus
c:\ado\plus

. ls
<dir> 3/25/14 13:48 .
<dir> 3/25/14 13:48 ..
<dir> 1/17/14 16:42 a
<dir> 1/17/14 16:33 b
21.9k 3/11/14 19:25 backup.trk
<dir> 1/17/14 16:41 c
<dir> 3/25/14 13:48 d
<dir> 1/17/14 16:38 e
<dir> 1/17/14 16:33 f
<dir> 1/17/14 16:39 i
<dir> 1/17/14 16:46 k
<dir> 1/17/14 16:44 l
<dir> 3/10/14 17:46 m
<dir> 11/06/13 14:59 o
<dir> 2/18/14 15:45 p
<dir> 11/06/13 14:59 s
22.5k 3/25/14 13:48 stata.trk
<dir> 1/17/14 16:44 t
<dir> 3/05/14 13:18 w
<dir> 3/11/14 19:25 x
<dir> 1/17/14 16:38 _

. adoupdate
(note: adoupdate updates user-written files; type -update- to check for updates to official
Stata)
(note: package psmatch2 was installed more than once; older copy removed)
file c:\ado\plus\next.trk could not be opened
stata(): 3598 Stata returned error
netrm(): - function returned error
rmdup(): - function returned error
find_and_uninst_1dup_std(): - function returned error
find_and_uninst_dups(): - function returned error
pkg_chk_and_update(): - function returned error
<istmt>: - function returned error
r(3598);