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SQL*Loader-704: Internal error

707781Mar 22 2010 — edited Mar 31 2010
Dear all,
I have run this command in windows
sqlplus a/b@c
it is connected successfully, I can run sql and results returned.

however, I run this sql loader command
sqlldr a/b@c control=test.ctl data=test.txt

but error is returned

SQL*Loader-704: Internal error: ulconnect: OCIServerAttach [0]
ORA-12154: TNS:could not resolve the connect identifier specified


what are the reasons and why?
thank you very much!
This post has been answered by 732412 on Mar 22 2010
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Locked on Apr 28 2010
Added on Mar 22 2010
#database-key-features, #export-import-sql-loader-external-tables
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