sub process quit unexpectedly

[rikardo1979]

(14th Jun, 2014 07:56 AM)149047 Wrote:  Hi all!
Whenever I apt-get upgrade or try to install something I frequently get this error
(I copied this bit from the xbian Update process)

(Reading database ... 90% │
│ (Reading database ... 95% │
│ (Reading database ... 100% │
│ (Reading database ... 38340 files and directories currently in │
│ Unpacking libao4 (from .../libao4_1.1.0-2_armhf.deb) ... │
│ E: Sub-process /usr/bin/dpkg exited unexpectedly

can someone help?
thanks in advance
Markus

please provide all necessary information and log files.links are in my signature.thx