How to fix the Oracle error ORA-15518: parallel preprocessing encountered an unexpected error?

In this post, you’ll learn more about the Oracle ErrorORA-15518: parallel preprocessing encountered an unexpected error with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-15518: parallel preprocessing encountered an unexpected error

Reason for the Error ORA-15518: parallel preprocessing encountered an unexpected error

An unexpected error occured during parallel preprocessing.

How to fix the Error ORA-15518: parallel preprocessing encountered an unexpected error ?

You can fix this error in Oracle by following the below steps

Find the root cause or simply preprocess the workload using only one process.