Juan, Find out whether datafile needs recovery or not by selecting V$DATAFILE_HEADER. Muqthar -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Juan Cachito Reyes Pacheco Sent: Friday, May 07, 2004 6:44 PM To: oracle-l@xxxxxxxxxxxxx Subject: Read only tablespace ORA-01251: Unknown File Header Version read for file number Hi I don't know if you know please how to fix this error ORA-01251: Unknown File Header Version read for file number The datafiles was copied, but for some reason in windows xp, (problem didn't happen with other databases), can recognize a readonly datafile, then the tablespace was offile, copying again and trying to put online I got the previous error. The datafile is there, all is ok, v$datafile checked, etc., I don't know if there is a trick to fix it. Thanks Juan Carlos Reyes Pacheco OCP Database 9.2 Standard Edition ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html ----------------------------------------------------------------- * * * * * * * * * The information contained in this E-mail message is privileged, confidential, and may be protected from disclosure; please be aware that any other use, printing,copying, disclosure or dissemination of this communication may be subject to legal restriction or sanction. If you think that you have received this E-mail message in error, please reply to the sender and delete it from your computer. Thank you. ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------