Oracle EX and SQL Plus: How to Recover a Dump File?
What version of Oracle? How was the .dmp file created? You can look at the first line in your .dmp file (assuming it's a file generated by exp) to get the version of the utility that dumped it. You will probably need to use imp, although I don't know what problems you are having with impdp messages - errors and the command line used would be helpful. Assuming this was produced by exp, RECOVER won't help.
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open command prompt and type imp user / password @db you will be prompted to provide file and path.
if you get a message like: IMP-00010: invalid export file, header check error IMP-00000: Import failed, this means that the file was created by the data pump or the original version is newer. if not, follow the prompts to get really straight forward.
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