Cause: You attempted to specify a type of file to be backed-up or restored, but the current conversation cannot process this type of file. For example, you specified an archived log to be included in a datafile backup set. The specified file will not be included in the backup or restore operation. See the solution below.
Error solution: No action required - the conversation is still active, and more files can be specified.
Database version: Oracle 11g Release 2 (11.2)