Datamaker uses an Oracle Instant Client 188.8.131.52 that is located under (C:\Program Files (x86)\Grid_Tools\)GTDatamaker folder. We have not tested Datamaker using later versions and we don’t have a process to upgrade the Oracle instant client. We will look into shipping a later version with the product in a future release.
There is a workaround, but it’s not QA’ed. What you can do is download the Oracle Instant Client from the following location (http://www.oracle.com/technetwork/topics/winsoft-085727.html ) by unzipping the contents to your GTDatamaker folder. Just grab the version “Instant Client Package - Basic: All files required to run OCI, OCCI, and JDBC-OCI applications”
Make sure your TDM services are down when overlaying the Oracle Instant Client files.