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ALTER TABLESPACE ... READ ONLY fails with ORA-00604: error occurred at recursive SQL level 1 ORA-00372: file .. cannot be modified at this time ORA-01110: data file.... (Doc ID 1662730.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.5 and later
Information in this document applies to any platform.

Symptoms

 Alter Tablespace to Read Only Mode fails with below error:

SQL>ALTER TABLESPACE USERS READ ONLY;
   ALTER TABLESPACE USERS READ ONLY
*
ERROR at line 1:
ORA-00604: error occurred at recursive SQL level 1
ORA-00372: file 4 cannot be modified at this time    
ORA-01110: data file 4: 'E:\ORACLE\PRODUCT\11.2\ORADATA\ORCL\USERS01.DBF'
ORA-06512: at line 18

Changes

Trying to put a tablespace read only , for example in order to do an TTS (Transportable Table Space) export / expdp .

Cause

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