From a 15.1 environment, copy the c-oracle.jar file from <CLARITY_HOME>/lib/ to the <CLARITY_HOME/lib> folder in your 14.2 or 14.3 environment.
If you have trouble locating the file, please open a support case to contact CA Technical Support.
Restart the bg service(s):
<CLARITY_HOME>/bin/service stop start bg
Re-run the Time Slicing job.
Note: This problem was not reported in 14.4 or 15.1.