Are you upgrading Oracle Demantra to 12.2.2?
By ChristineS-Oracle on Dec 17, 2013
When upgrading your Demantra application from an older version directly to 12.2.2 there are some issues of which you need to be aware.
ORA errors, Excel missing cut/paste data, performance issues, Notes, Calendar and other known upgrade issues. For example, did you know creation of new Indexes on sales data can take a long time? Or that Worksheets may not opening after the upgrade?
Please refer to MyOracleSupport (MOS) Doc ID 1602288.1 for details on issues and their known resolutions.