buildbot exception in on aoo-w741x

[buildbot]

The Buildbot has detected a build exception on builder aoo-w741x while building 
. Full details are available at:
    https://ci.apache.org/builders/aoo-w741x/builds/96

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

Buildslave for this Build: bb-win7

Build Reason: The Nightly scheduler named 'aoo-win7-41x' triggered this build
Build Source Stamp: [branch openoffice/branches/AOO414] HEAD
Blamelist: 

BUILD FAILED: exception delete old build

Sincerely,
 -The Buildbot