An I/O operation on the specified redo log file failed with the specified return code, error number, and error text. In an Oracle RAC environment, this message includes the name of the relevant RAC member.
The PowerExchange Express CDC for Oracle log reader tries to use the alternate log file that has the same sequence number. If this alternate log file does not exist, CDC processing ends.
Try to correct the I/O problem. If you cannot correct the I/O problem or find the alternate log file, rematerialize the target. Then cold start the CDC session.