Re: ORA-00201 during startup

>>> PS: the datafiles header contain already the new 11.2.0.4 compatible
parameter.

How did you find this out? Did you really mean "datafiles"? If the datafiles have been marked as 11.2.0.4 then it looks as if someone has already got at least partway through upgrading the database. It's possible that your only option is to make sure that you complete the upgrade.
Make sure you take a backup of all the database files (including control files, redo logs, etc.) before you try anything else.

Regards
Jonathan Lewis

On Wed, 26 May 2021 at 10:06, Abdellah DANY <abd.dany_at_gmail.com> wrote:

> Hi experts,
>
> We inadvertently startup database bad compatible parameter. 11.2.0.4
> instead of 11.2.0.3.
>
> When trying to restart it using the good init file, we got this error.
>
> ORA-00201: control file version 11.2.0.4.0 incompatible with ORACLE version
> 11.2.0.3.0
> ORA-00202: control file: '../.../oracle/control/control01.ctl'
>
> Is there a way to start the database without upgrading/downgrading
> procedure?
>
> PS: the datafiles header contain already the new 11.2.0.4 compatible
> parameter.
>
> Thanks in advance.
>
>

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