buildbot failure in on aoo-win7

[buildbot]

The Buildbot has detected a new failure on builder aoo-win7 while building . 
Full details are available at:
    https://ci.apache.org/builders/aoo-win7/builds/595

Buildbot URL: https://ci.apache.org/

Buildslave for this Build: bb-win7

Build Reason: forced: by IRC user <dacha> (privmsg): try build r1778965
Build Source Stamp: HEAD
Blamelist: 

BUILD FAILED: failed delete old build

Sincerely,
 -The Buildbot