Oracle's oraclebulkcopy does not support transactional processing

An exception was thrown after using a transaction during Oraclebulkcopy bulk data import.

You can import batches correctly when you are not using transactions.

ORA-12154: Unable to resolve the specified connection string.

But the TNS configuration is certainly not wrong,

Is it not connectionstring that the execution of the transaction has changed,

And also:

Temporarily discovers that Oracle's bulkcopy does not support transactional processing

using (oraclebulkcopy bulkcopy = new Oraclebulkcopy (conn,oraclebulkcopyoptions.useinternaltransaction))

If the transaction is not supported, this oraclebulkcopyoptions.useinternaltransaction how to explain.

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error code: oraclebulkcopy for transaction processing

Oracle's oraclebulkcopy does not support transactional processing