sudo dpkg -i libopenexr6_1.6.1-7ubuntu1_amd64.deb 
Selecting previously unselected package libopenexr6:amd64.
dpkg: warning: files list file for package 'oracle-java8-installer' missing; assuming package has no files currently installed
(Reading database ... 371215 files and directories currently installed.)
Preparing to unpack libopenexr6_1.6.1-7ubuntu1_amd64.deb ...
Unpacking libopenexr6:amd64 (1.6.1-7ubuntu1) ...
dpkg: dependency problems prevent configuration of libopenexr6:amd64:
 libopenexr6:amd64 depends on libilmbase6 (>= 1.0.1); however:
  Package libilmbase6 is not installed.

dpkg: error processing package libopenexr6:amd64 (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 libopenexr6:amd64