ORA-31645: unable to read from dump file "string"
Cause: Import could not read from the dumpfile, probably because of a device error. This message is usually followed by a device message from the operating system
Action: Take appropriate action to restore the device
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ORA-31644: unable to position to block number string in dump file "string"
Cause: Export or Import was unable to position its file pointer to a specific block within the dump file. This message is usually followed by device messages from the operating system
Action: Take appropriate action based on the device messages
ORA-31643: unable to close dump file "string"
Cause: Export or Import was unable to close the dump file. This message is usually followed by device messages from the operating system
Action: Take appropriate action to restore the device
ORA-31642: the following SQL statement fails: string
Cause: An internal error was generated from package DBMS_METADATA
Action: Contact Oracle Customer Support and report the error
ORA-31641: unable to create dump file "string"
Cause: Export was unable to create the specified file with write enabled
Action: Check the file name and file system for the source of the error
ORA-31640: unable to open dump file "string" for read
Cause: Import was unable to open the export file for reading. This message is usually followed by device messages from the operating system
Action: Take appropriate action to restore the device
ORA-31639: unexpected data found
Cause: The Master Table or Data Pump file contents appear invalid. The table or file may not have been produced by a Data Pump job, or they may have been corrupted
Action: Select a different job name (Master Table) or replace the table or file with one produced by Data Pump
ORA-31638: cannot attach to job string for user string
Cause: Unable to attach a job to a session. Refer to any following or prior error messages for clarification
Action: Eliminate the problems indicated
ORA-31637: cannot create job string for user string
Cause: Unable to create or restart a job. Refer to any following or prior error messages for clarification
Action: Eliminate the problems indicated
Cause: The session executing the attach is already attached to the specified job
Action: Select a different job or create a new session