RMAN> convert tablespace ORA_data to platform 'Microsoft Windows x86 64-bit' format='/dmp/transport_win_%U'; Starting backup at 19-APR-11 using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: sid=1000 devtype=DISK RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03002: failure of backup command at 04/19/2011 12:09:50 RMAN-06599: tablespace ORA_data is not read-only RMAN>