On a new installation for Smart Materials 8.3, after the database is created and following the steps to apply the patch on the new database (executing 'datapatch -verbose' command), this error message is shown in the Command Prompt:
Queryable inventory could not determine the current opatch status
To resolve this issue, delete %ORACLE_HOME%\rdbms\log\xml_File.xml file.
To do that you need to kill all processes holding this data, which are most likely any oracle.exe or CMD.exe processes.
After this file is deleted, start datapatch -verbose again as described in Patch Post-Installation.
For more information, refer to Oracle Knowledge base article: 'Datapatch failed with error 'Queryable inventory could not determine the current opatch status' (Doc ID 2339328.1).