Oracle impdb on windows generates a subdirectory I am importing to a windows oracle, a dump file produced on Linux. But oracle generates a subfolder in the dpdump directory /76E0F91BE49D480CB2633847BD640FC5\  and causes an "ORA-31640: unable to open dump file" error.


ORA-39001: invalid argument value
ORA-39000: bad dump file specification
ORA-31640: unable to open dump file "E:\oracle\admin\orcl\dpdump\/76E0F91BE49D480CB2633847BD640FC5\backup_DB_01.dmp" for read
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.



I shut down oracle and deleted that long subfolder. But it gets recreated every time I run impdp. Any suggestion?
Ask your System admin to grant read write permission on the directory (where dump is located) and run cmd as admin and then try to run impdp command.

For more details : 
http://www.dba-oracle.com/t_ora_31640_unable_to_open_dump_file_for_read.htm