ORA-19505: failed to identify file & quot;/oradata1/dump/

ORA-19505: failed to identify file "/oradata1/dump/CASCTRL07.DMP EXPDP problem expdp error $ impdp system/manager directory = DMP content = METADATA_ONLY dumpfile = primary, CASCTRL04.DMP, CASCTRL05.DMP, CASCTRL06.DMP, CASCTRL07.DMP, CASCTRL08.DMP full = Y logfile = export job_name = my_job02 parallel = 8 Import: Release 10.2.0.5.0-64bit Production on Thursday, 27 June, 2013 11:16:32 Copyright (c) 2003,200 7, Oracle. all rights reserved. connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.5.0-64bit ProductionWith the Partitioning, OLAP, Data Mining and Real Application Testing optionsORA-39002: invalid operationORA-31694: master table "SYSTEM ". "MY_JOB02" failed to load/unloadORA-31640: unable to open dump file "/oradata1/dump/CASCTRL07.DM P "for readORA-19505: failed to identify file"/oradata1/dump/CASCTRL07.DMP "ORA-27046: file size is not a multiple of logical block sizeAdditional information: 1 Additional information: 1514345468 Additional information: 4096 cause: A file error occurs. You can perform ftp again. Summary: The ora-19505 is caused by file errors and cannot be read, because the binary file is edited, such as spfile corruption; there is a file ftp Frame loss problem, such as the case above;