E: dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem. E: _cache->open() failed, please report.

  • Did you run that command? sudo dpkg --configure -a – Gunnar Hjalmarsson May 16 '17 at 20:14
  • Yes, but nothing happened. Now Synaptic pkg manager is not working. Maybe I should reinstall it? – japesy May 17 '17 at 13:48
  • E: The package draftsight needs to be reinstalled, but I can't find an archive for it. – japesy May 17 '17 at 13:59
  • I think you need to tell us much more. Which Ubuntu version are you using, when did the package problems start? Did you upgrade to a new Ubuntu version? Also, please edit your question and include the complete output of the terminal commands sudo apt-get update and sudo apt-get upgrade – Gunnar Hjalmarsson May 17 '17 at 14:46

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