Cause
attempting to modify the contents of a file that cannot be modified. The file is most likely part of a read only tablespace but may be in the process of going offline, or the database may be in the process of closing.
attempting to modify the contents of a file that cannot be modified. The file is most likely part of a read only tablespace but may be in the process of going offline, or the database may be in the process of closing.
check the status of the file and its tablespace
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
https://community.oracle.com/message/3650142
https://community.oracle.com/message/1805458
https://community.oracle.com/message/1343581
https://community.oracle.com/message/2520610
https://community.oracle.com/message/9730731
https://community.oracle.com/message/3473173
https://community.oracle.com/message/1685649
https://community.oracle.com/message/9213376
https://community.oracle.com/message/1957214
https://community.oracle.com/message/9723332
https://community.oracle.com/message/10359779
https://community.oracle.com/message/2310549
https://community.oracle.com/message/2677000
https://community.oracle.com/message/1603043
https://community.oracle.com/message/10872408
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