How to fix the Oracle error RMAN-04026: unable to open a temporary file: “string”?

In this post, you’ll learn more about the Oracle ErrorRMAN-04026: unable to open a temporary file: “string” with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

RMAN-04026: unable to open a temporary file: “string”

Reason for the Error RMAN-04026: unable to open a temporary file: “string”

Opening of a temporary file failed. If could be that the system does not have enough resources (disk space, memory or similar).

How to fix the Error RMAN-04026: unable to open a temporary file: “string” ?

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

Verify and free some system resources memory and try again.