Cannot install Software from the Software-Center

Question

I have a problem. I want to install software from the software-center but when I click on "Install" comes a pop-up with this text in German:

Anscheinend gibt es einen Programmfehler in aptdaemon, der Anwendung, die Ihnen das Installieren/Entfernen von Anwendungen und das Ausführen weiterer Paketverwaltungsaufgaben ermöglicht.

In details:

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/aptdaemon/worker.py", line 968, in simulate
    trans.unauthenticated = self._simulate_helper(trans)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/worker.py", line 1092, in _simulate_helper
    return depends, self._cache.required_download, \
  File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 235, in required_download
    pm.get_archives(fetcher, self._list, self._records)
SystemError: E:I wasn't able to locate a file for the libwww-robotrules-perl package. This might mean you need to manually fix this package.

Sorry for this question. I have Ubuntu since two days and my English is bad.

Answer 1

Schließe das Software-Center. Öffne ein Terminal (Windows-Taste und Ter... eintippen) und führe folgenden Befehl aus: sudo apt-get install -f. Gib auf Nachfrage dein Passwort ein. Wenn das erfolgreich ist, kannst du es erneut mit dem Softwarecenter versuchen.

In English: Close Software-Center. Open a Terminal. Run sudo apt-get install -f. Enter your password if asked. Then open Software-Center again.