Multiple-step OLE DB operation generated errors

I am running a simple FillSchema from a Netezza data source

dss = new DataSet();
ad = new OleDbDataAdapter(cmd);
ad.SelectCommand = new OleDbCommand("SELECT * FROM " + objTable.name);
ad.SelectCommand.Connection = cn;
ad.FillSchema(dss, SchemaType.Source);

I get the following error:

System.Data.OleDb.OleDbException: Multiple-step OLE DB operation generated errors. Check each OLE DB status value, if available. No work was done.
   at System.Data.OleDb.OleDbServicesWrapper.GetDataSource(OleDbConnectionString constr, DataSourceWrapper& datasrcWrapper)
   at System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection)
   at System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject)
   at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup)
   at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
   at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
   at System.Data.OleDb.OleDbConnection.Open()
   at System.Data.Common.DbDataAdapter.QuietOpen(IDbConnection connection, ConnectionState& originalState)
   at System.Data.Common.DbDataAdapter.FillSchemaInternal(DataSet dataset, DataTable datatable, SchemaType schemaType, IDbCommand command, String srcTable, CommandBehavior behavior)
   at System.Data.Common.DbDataAdapter.FillSchema(DataSet dataSet, SchemaType schemaType, IDbCommand command, String srcTable, CommandBehavior behavior)
   at System.Data.Common.DbDataAdapter.FillSchema(DataSet dataSet, SchemaType schemaType)
   at IMS.DF2.IMSCubeGenerator.IMSCube.AddTableToDatasourceView(table objTable) in C:\DIUP\DF2\IMSCubeGenerator\IMSCube.cs:line 902

What am I doing wrong here?

How can I get to the errors underneath (Check each OLE DB status value)?

What's your connection string?

It will be either your Driver, your Cursor or security (I had the same problem using Integrated Security).

Changing this to a username/password fixed my issue.

See here, here and here for more info.