Error thrown while executing JCo from Lotus domino

Question

I am trying to use JCo in Java agents in a lotus domino application. Here is my code:(This Java agent calls a Remote enabled function module in SAP which gives the sum of two given numbers)
import lotus.domino.*;
import java.util.*;
import java.io.*;
import com.sap.mw.jco.*;
public class JavaAgent extends AgentBase
private static JCO.Client jClient;
public JCO.Client getJCOClient(String poolName) throws IOException, JCO.Exception
System.out.println("Inside getJCOClient method");
System.out.println("Pool Name : "+ poolName);
boolean poolExists = false;
JCO.PoolManager poolManager = JCO.PoolManager.singleton();
String poolNames[] = poolManager.getPoolNames();
// To check whether the given pool name already exists
if(poolNames != null)
for(int poolIter = 0;poolIter<poolNames.length;poolIter++)
if(poolNames[poolIter].equals(poolName))
System.out.println("POOL ID =====>> "+poolName);
System.out.println("POOL NAMES["+ poolIter "] ========>>"poolNames[poolIter]);
poolExists = true;
break;
String s = String.valueOf( poolExists );
System.out.println("pool Exists :" + s );
if(poolExists == false)
try
int maxConnections = 50;
String JCOClient = "111";
String user = "apabap4";
String password = "sap123";
String language = "en";
String ashost = "172.25.10.68";
String sysnr = "00";
//To create an instance of a client pool to the remote SAP system
System.out.println("Before addClientPool");
System.out.println("Pool Name : " + poolName);
JCO.addClientPool(poolName,maxConnections,JCOClient,user,password,language,ashost,sysnr);
// JCO.createClient(JCOClient, user,password,language, "172.25.10.68");
System.out.println("New Connection Pool Created");
catch(JCO.Exception jcoe)
throw new JCO.Exception(jcoe.getGroup(),jcoe.getKey(),"Error in client pool creation "+jcoe.toString());
try
//getClient() method returns a client connection from the specified spool
jClient = JCO.getClient(poolName);
catch(JCO.Exception jcoe1)
throw new JCO.Exception(jcoe1.getGroup(),jcoe1.getKey(),"Error in getting JCO client "+jcoe1.toString());
return jClient;
// End of method getJCOClient()
public void releaseJCOClient() throws JCO.Exception
try
JCO.releaseClient(jClient);
catch(JCO.Exception jcoe2)
throw new JCO.Exception(jcoe2.getGroup(),jcoe2.getKey(),"Error in releasing client "+jcoe2.toString());
public void NotesMain()
try {
Session session = getSession();
AgentContext agentContext = session.getAgentContext();
Document doc = agentContext.getDocumentContext();
JavaAgent jcoObj = new JavaAgent();
JCO.Client jClient = null;
String poolId = new String("EG_POOL");
IFunctionTemplate ifun;//For function object
JCO.Function func;
JCO.ParameterList importParams,exportParams,tableParams;
try{
jClient = jcoObj.getJCOClient(poolId);
System.out.println("After Getting Connection");
System.out.println("Attributes:" + jClient.getAttributes());
//Create a repository object
JCO.Repository mRepository = new JCO.Repository("myJCO_REPOSITORY", jClient);
//Creating a function object
ifun = mRepository.getFunctionTemplate("ZSUM");// The Function Name
func = ifun.getFunction();
System.out.println("Function name " + func.getName());
//To get the import parameters in the function module
importParams = func.getImportParameterList();
System.out.println("Import parameters"+ importParams);
importParams.appendValue("OPERAND1",importParams.TYPE_INT,4,"25");
importParams.appendValue("OPERAND2",importParams.TYPE_INT,4,"25");
jClient.execute(func);//Executing the function
//To get the export parameters in the function module
exportParams = func.getExportParameterList();
System.out.println("Export parameters" + exportParams);
int sumVl = exportParams.getInt("SUM");
Integer sumValue = new Integer(sumVl);
System.out.println("Sum Value" + sumValue);
doc.replaceItemValue("txtSum", sumValue.toString());
//releaseJCOClient();
catch(IOException ioe)
ioe.printStackTrace();
catch(JCO.Exception jcoe1)
jcoe1.printStackTrace();
} catch(Exception e) {
e.printStackTrace();
While executing this agent I am getting the following exception.
08/25/2004 06:27:45 PM HTTP JVM: java.lang.ExceptionInInitializerError: JCO.classInitialize(): Could not load middleware layer 'com.sap.mw.jco.rfc.MiddlewareRFC' Native Library C:\Lotus\Domino\sapjcorfc.dll already loaded in another classloader
08/25/2004 06:27:45 PM HTTP JVM: at com.sap.mw.jco.JCO.<clinit>(Unknown Source)
08/25/2004 06:27:45 PM HTTP JVM: at JCoCallTrans.getJCOClient(JCoCallTrans.java:42)
08/25/2004 06:27:45 PM HTTP JVM: at JCoCallTrans.NotesMain(JCoCallTrans.java:88)
08/25/2004 06:27:45 PM HTTP JVM: at lotus.domino.AgentBase.runNotes(Unknown Source)
08/25/2004 06:27:45 PM HTTP JVM: at lotus.domino.NotesThread.run(NotesThread.java:208)
08/25/2004 06:27:45 PM HTTP JVM: Error cleaning up agent threads
Also I have placed the jco.jar in lib of jvm in Domino directory i.e.,
Lotus\Domino\jvm\lib and
sapjcorfc.dll and librfc32.dll in system32 of WINNT folder.
Kindly help me to rectify this problem
Arokiaraj.S

Answer 1

Hi,
It is clearly an issue in your map. You can test your map out of Orchestration to make sure it is working.
"Exception has been thrown by the target of an invocation" is a very generic exception. you
need the inner exception to see the actual error. You can also try to test the map in the MapTester tool. It also shows also the inner exception. It's designed for BizTalk 2010 but with the .exe file you maybe also can test BizTalk 2006 maps,.
http://code.msdn.microsoft.com/Execute-a-BizTalk-map-from-26166441
If this answers your question please mark as answer. If this post is helpful, please vote as helpful by clicking the upward arrow mark next to my reply.