files - Synaptic package manager problems

Synaptic Package Manager fails, printing this message on startup:

E: ファイル  をオープンできませんでした - open (2: そのようなファイルやディレクトリはありません)
E: _cache->open() failed, please report.

The English version of this error message is:

E: Failed to open file - open (2: No such file or directory)
E: _cache->open() failed, please report.

$ sudo dpkg --configure -a  
$ sudo apt-get install -f  
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.

How do I correct this problem?