When upgrading my test environment to 7.6, I took a database snapshot from production and upgraded to 7514.  When I did this, I received database null constraint errors that I got past by editing the updatemanager.bat file to ignore errors in  the processorinfo, softwarelicenses and wordmap tables.  This seemed to work fine.

When upgrading to 7.6, the process failed with the following error:

java.sql.SQLException: Invalid column name 'LICENSETYPE'.

This is the same error I was getting when updating to 7514, but got past by editing the update manager.  I am not sure how to proceed.