Can anybody help me with the following problem:
We have an oracle database called DWS with a dblink to another oracle database DCP. We don't have any problem reading data from the DWS-database, but reading from DCP doesn't work. We always get the following error:

java.sql.SQLException: ORA-12705: invalid or unknown NLS parameter value specified
ORA-02063: preceding line from DCP

We get the same result using synonyms.
Strange thing: when we execute the same query in Toad there is no problem reading the dblink-query

Query: "select * from tcp710@dcp.world"

We use Eclipse 3.1.1

[b]Hibernate version:[/b]
Hibernate 3.0.5

[b]Full stack trace of any exception that occurs:[/b]
09:08:29 DEBUG [main]: opening JDBC connection
09:08:29 DEBUG [main]: total checked-out connections: 0
09:08:29 DEBUG [main]: using pooled JDBC connection, pool size: 0
09:08:29 DEBUG [main]: current autocommit status: false
09:08:29 DEBUG [main]: SQL query: select ibody from APPLICATION.TCP710 where ibody = '6566403'
09:08:29 DEBUG [main]: about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
09:08:29 DEBUG [main]: select ibody from APPLICATION.TCP710 where ibody = '6566403'
Hibernate: select ibody from APPLICATION.TCP710 where ibody = '6566403'
09:08:29 DEBUG [main]: preparing statement
09:08:31 DEBUG [main]: about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
09:08:31 DEBUG [main]: closing statement
09:08:31 DEBUG [main]: could not execute query [select ibody from APPLICATION.TCP710 where ibody = '6566403']
java.sql.SQLException: ORA-12705: invalid or unknown NLS parameter value specified
ORA-02063: preceding line from DCP

at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:289)
at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:582)
at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1986)
at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteDescribe(TTC7Protocol.java:880)
at oracle.jdbc.driver.OracleStatement.doExecuteQuery(OracleStatement.java:2516)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2850)
at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:609)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:537)
at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:120)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1272)
at org.hibernate.loader.Loader.doQuery(Loader.java:391)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:218)
at org.hibernate.loader.Loader.doList(Loader.java:1593)
at org.hibernate.loader.Loader.list(Loader.java:1577)
at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:112)
at org.hibernate.impl.SessionImpl.listCustomQuery(SessionImpl.java:1414)
at org.hibernate.impl.SQLQueryImpl.list(SQLQueryImpl.java:153)
at org.hibernate.impl.AbstractQueryImpl.uniqueResult(AbstractQueryImpl.java:603)
at com.volvocars.vcc.cws.data.OrderDao.getByBodyNumber(OrderDao.java:58)
at com.volvocars.vcc.cws.data.test.TestOrderDao.testGetByBodyNumber(TestOrderDao.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:478)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:344)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
09:08:31 WARN [main]: SQL Error: 12705, SQLState: 72000
09:08:31 ERROR [main]: ORA-12705: invalid or unknown NLS parameter value specified
ORA-02063: preceding line from DCP

09:08:31 ERROR [main]: class com.volvocars.vcc.cws.data.OrderDao
org.hibernate.exception.GenericJDBCException: could not execute query
at org.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:92)
at org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:80)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.loader.Loader.doList(Loader.java:1596)
at org.hibernate.loader.Loader.list(Loader.java:1577)
at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:112)
at org.hibernate.impl.SessionImpl.listCustomQuery(SessionImpl.java:1414)
at org.hibernate.impl.SQLQueryImpl.list(SQLQueryImpl.java:153)
at org.hibernate.impl.AbstractQueryImpl.uniqueResult(AbstractQueryImpl.java:603)
at com.volvocars.vcc.cws.data.OrderDao.getByBodyNumber(OrderDao.java:58)
at com.volvocars.vcc.cws.data.test.TestOrderDao.testGetByBodyNumber(TestOrderDao.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:478)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:344)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.sql.SQLException: ORA-12705: invalid or unknown NLS parameter value specified
ORA-02063: preceding line from DCP

at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:289)
at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:582)
at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1986)
at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteDescribe(TTC7Protocol.java:880)
at oracle.jdbc.driver.OracleStatement.doExecuteQuery(OracleStatement.java:2516)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2850)
at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:609)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:537)
at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:120)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1272)
at org.hibernate.loader.Loader.doQuery(Loader.java:391)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:218)
at org.hibernate.loader.Loader.doList(Loader.java:1593)
... 20 more
09:08:31 DEBUG [main]: rollback
09:08:31 DEBUG [main]: before transaction completion
09:08:31 DEBUG [main]: before transaction completion
09:08:31 DEBUG [main]: rolled back JDBC Connection
09:08:31 DEBUG [main]: after transaction completion
09:08:31 DEBUG [main]: after transaction completion
09:08:31 DEBUG [main]: - rollback
09:08:31 DEBUG [main]: closing session
09:08:31 DEBUG [main]: closing JDBC connection [ (open PreparedStatements: 0, globally: 0) (open ResultSets: 0, globally: 0)]
09:08:31 DEBUG [main]: returning connection to pool, pool size: 1
09:08:31 DEBUG [main]: after transaction completion
09:08:31 DEBUG [main]: after transaction completion
09:08:31 DEBUG [main]: - connection closed

[b]Name and version of the database you are using:[/b]
Oracle 8.1.7

I've found the solution myself.

My settings in Windows weren't the same as the NLS-parameters of the database. After changing these, everything works.