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Well, one problem is here:
You're not setting a type on these, so Oracle doesn't know what it is. You can specify that as part of adding the parameters
[url http://docs.oracle.com/cd/E11882_01/win.112/e18754/OracleParameterCollectionClass.htm#autoId14]You can see this call in the documentation, which has a link to the list of types as well.
ComandOracle4.Parameters.Add("EMMP", OracleDbType.Decimal, 2, ParameterDirection.Input); // (Note that this might be Int32 or Int64 as well, I can't tell from the provided information) ComandOracle4.Parameters.Add("EMPLEADOS",OracleDbType.BFile, bfile, ParameterDirection.Input);