JCO DATA_BUFFER_EXCEEDED exception

Hi all,

while executing below code I got this error;

ERROR;

com.sap.mw.jco.JCO$Exception: (127) JCO_ERROR_FIELD_NOT_FOUND: Field EBELN not a member of RFC_DB_FLD

at com.sap.mw.jco.JCO$MetaData.indexOf(Unknown Source)

at com.sap.mw.jco.JCO$MetaData.getDescription(Unknown Source)

at Test6.<init>(Test6.java:33)

at Test6.main(Test6.java:62)

Exception in thread "main"

FOLLOWING CODE;

import java.util.ArrayList;

import com.sap.mw.jco.*;

import com.sap.mw.jco.JCO.Field;

import com.sap.mw.jco.JCO.Record;

public class Test6 {

JCO.Client mConnection;

JCO.Repository mRepository;

IFunctionTemplate ftemplate;

public Test6() {

try {

mConnection =JCO.createClient("800","sapuser","sapuser","en","10.113.10.201","00");

mConnection.connect();

System.out.println("connection attribute:"+ mConnection.getAttributes());

if (mConnection == null) {

System.out.println("Connection to SAP Server failed.");

}

mRepository = new JCO.Repository("User", mConnection);

ftemplate = mRepository.getFunctionTemplate("RFC_READ_TABLE");

}

catch (Exception ex) {

ex.printStackTrace();

System.exit(1);

}

JCO.Function function = ftemplate.getFunction();

JCO.ParameterList importParamList = function.getImportParameterList();

importParamList.setValue("EKKO", "QUERY_TABLE");//For Purchase Order

importParamList.setValue(",", "DELIMITER");

JCO.Table tableData = function.getTableParameterList().getTable("DATA");

System.out.println(""+tableData);

JCO.Table fields = function.getTableParameterList().getTable("FIELDS");

System.out.println(""+fields);

String sg =fields.getDescription("EBELN");

System.out.println("...."+sg);

mConnection.execute(function);

if (tableData.getNumRows() > 0) {

do {

System.out.println("Purchase Order Details::");

for (JCO.FieldIterator e = tableData.fields();e.hasMoreElements();) {

JCO.Field field = e.nextField();

String str = field.getString();

String[] values = str.split(",");

for (int j = 0; j < values.length; j++) {

System.out.println("\t"+values[j].trim());

}

}

} while (tableData.nextRow());

}

else

System.out.println("No results found");

mConnection.disconnect();

}

public static void main (String args[]) {

Test6 app = new Test6();

}

}

please suggest suitable code.....

Thanks in advance.....

Ramesh