How to fix the Oracle error UDI-00003: all allowable logon attempts failed?

In this post, you’ll learn more about the Oracle ErrorUDI-00003: all allowable logon attempts failed with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

UDI-00003: all allowable logon attempts failed

Reason for the Error UDI-00003: all allowable logon attempts failed

Attempts were repeatedly made to log on with an invalid username or password.

How to fix the Error UDI-00003: all allowable logon attempts failed ?

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

Shut down the utility, then restart and retry with a valid username and password.