Oracle Error Message
RMAN-08036: channel string: could not create control file record for string string
Reason for the Error
The record identifying the named file was no longer present in the target database control file, and repeated attempts to inspect the file were unsuccessful in creating the record. This could be because the circular-reuse section of the control file which holds information about the specified type of file is too small and there is other database activity which is causing the record to be overwritten before it can be used.
Solution
Try increasing either the size of the control file circular-reuse section for this file type (datafile copy or archived log, as indicated in the error message, or the CONTROL_FILE_RECORD_KEEP_TIME initialization parameter. If neither of those remedies works then contact Oracle.
