Oracle Error Message
RMAN-06055: could not find archived log with sequence string for thread string
Reason for the Error
A log which was on disk at the start of media recovery or which should have been restored from a backup set could not be found.
Solution
Check the Recovery Manager message log to see if the log was restored by a previous job step. If so, then check the V$ARCHIVED_LOG view to see if the log is listed in the control file. If so, then validate that the log exists on disk and is readable. If the log was not restored, or was restored but no record of the log exists in V$ARCHIVED_LOG, then contact Oracle Support Services.
