SQL batch with PREPARE/EXECUTE statements via .NET gives AccessViolationException

System.AccessViolationException : Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

   at System.Data.Common.UnsafeNativeMethods.SQLMoreResults(OdbcStatementHandle StatementHandle)

   at System.Data.Odbc.OdbcStatementHandle.MoreResults()

   at System.Data.Odbc.OdbcDataReader.NextResult(Boolean disposing, Boolean allresults)

   at System.Data.Odbc.OdbcDataReader.Close(Boolean disposing)

   at System.Data.Odbc.OdbcDataReader.Dispose(Boolean disposing)

   at System.Data.Common.DbDataReader.Dispose()

   at System.Data.Odbc.OdbcCommand.ExecuteReaderObject(CommandBehavior behavior, String method, Boolean needReader, Object[] methodArguments, SQL_API odbcApiMethod)

   at System.Data.Odbc.OdbcCommand.ExecuteReaderObject(CommandBehavior behavior, String method, Boolean needReader)

   at System.Data.Odbc.OdbcCommand.ExecuteReader(CommandBehavior behavior)

   at System.Data.Odbc.OdbcCommand.ExecuteReader()

SELECT COUNT(*) FROM information_schema.tables

WHERE TABLE_SCHEMA='information_schema' AND TABLE_NAME='TABLESPACES'

INTO @tableExists;

SELECT 

	IF(@tableExists>0 

	,'SELECT    tablespace_name,    engine,    tablespace_type,    logfile_group_name,    extent_size FROM    information_schema.tablespaces ORDER BY tablespace_name , engine'

	,'SELECT NULL LIMIT 0')

INTO @query;

PREPARE s FROM @query;

EXECUTE s;

DEALLOCATE PREPARE s;