Problem while calling RFC function module in java

Question

Hi all
com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: Connect to SAP gateway failed
Connect_PM  GWHOST=<system.ab.ydydy.yyyd.com>, GWSERV=sapgw00, ASHOST=<system.ab.ydydy.yyyd.com>, SYSNR=00
LOCATION    CPIC (TCP/IP) on local host
ERROR       hostname '<system.ab.ydydy.yyyd.com>' unknown
TIME        Mon Jun 06 14:50:25 2005
RELEASE     640
COMPONENT   NI (network interface)
VERSION     37
RC          -2
MODULE      ninti.c
LINE        332
DETAIL      NiPGetHostByName2: hostname '<system.ab.ydydy.yyyd.com>' not found
SYSTEM CALL gethostbyname_r
COUNTER     1
     at com.sap.mw.jco.rfc.MiddlewareRFC$Client.nativeConnect(Native Method)
     at com.sap.mw.jco.rfc.MiddlewareRFC$Client.connect(MiddlewareRFC.java:1098)
     at com.sap.mw.jco.JCO$Client.connect(JCO.java:2983)
     at MyProject.Bapi2.<init>(Bapi2.java:43)
     at MyProject.Bapi2.main(Bapi2.java:231)
Pl help me
pradeep

Answer 1

Hi
This is my code....
Created on Jun 2, 2005
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package MyProject;
@author pradeep
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import com.sap.mw.jco.*;
public class Bapi2 extends Object {
   JCO.Client mConnection;
   JCO.Repository mRepository;
   public Bapi2() {
       try {
          // Change the logon information to your own system/user
          mConnection =
            JCO.createClient("122", // SAP client
               "<pradeep>", // userid
               "*****", // password
               "EN", // language
               "<abc11.aa.abc23.company.com>", // application server host name
               "<00>");//system no
          mConnection.connect();
          mRepository = new JCO.Repository("HLL", mConnection);
      catch (Exception ex) {
        ex.printStackTrace();
        System.exit(1);
      JCO.Function function = null;
      JCO.Table codes = null;
        try {
           function = this.createFunction("BAPI_COMPANYCODE_GETLIST");
           if (function == null) {
             System.out.println("BAPI_COMPANYCODE_GETLIST" +
                                     " not found in SAP.");
             System.exit(1);
           mConnection.execute(function);
           JCO.Structure returnStructure =
             function.getExportParameterList().getStructure("RETURN");
           if (! (returnStructure.getString("TYPE").equals("") ||
                    returnStructure.getString("TYPE").equals("S")) ) {
             System.out.println(returnStructure.getString("MESSAGE"));
             System.exit(1);
           codes =
             function.getTableParameterList().getTable("COMPANYCODE_LIST");
           codes.setRow(2);
codes.deleteRow();
codes.deleteRow(5);
codes.appendRow();
codes.setValue("XXXX", "COMP_CODE");
codes.setValue("Does not exist", "COMP_NAME");
codes.appendRows(2);
codes.setValue("YYYY", "COMP_CODE");
codes.setValue("Does not exist either", "COMP_NAME");
codes.nextRow();
codes.setValue("ZZZZ", "COMP_CODE");
codes.setValue("Nor does this", "COMP_NAME");
for (int i = 0; i < codes.getNumRows(); i++) {
codes.setRow(i);
             System.out.println(codes.getString("COMP_CODE") + '\t' +
                                     codes.getString("COMP_NAME"));
        catch (Exception ex) {
           ex.printStackTrace();
           System.exit(1);
        try {
           codes.firstRow();
           for (int i = 0; i < codes.getNumRows(); i++, codes.nextRow()) {
             function = this.createFunction("BAPI_COMPANYCODE_GETDETAIL");
             if (function == null) {
                System.out.println("BAPI_COMPANYCODE_GETDETAIL" +
                                        " not found in SAP.");
                System.exit(1);
             function.getImportParameterList().
                setValue(codes.getString("COMP_CODE"), "COMPANYCODEID");
             mConnection.execute(function);
             JCO.Structure returnStructure =
                function.getExportParameterList().getStructure("RETURN");
             if (! (returnStructure.getString("TYPE").equals("") ||
                      returnStructure.getString("TYPE").equals("S") ||
                      returnStructure.getString("TYPE").equals("W")) ) {
                System.out.println(returnStructure.getString("MESSAGE"));
             JCO.Structure detail =
                function.getExportParameterList().
                getStructure("COMPANYCODE_DETAIL");
             System.out.println(detail.getString("COMP_CODE") + '\t' +
                                     detail.getString("COUNTRY") + '\t' +
                                     detail.getString("CITY"));
       catch (Exception ex) {
          ex.printStackTrace();
          System.exit(1);
       mConnection.disconnect();
     public JCO.Function createFunction(String name) throws Exception {
       try {
          IFunctionTemplate ft =
            mRepository.getFunctionTemplate(name.toUpperCase());
          if (ft == null)
            return null;
          return ft.getFunction();
      catch (Exception ex) {
        throw new Exception("Problem retrieving JCO.Function object.");
   public static void main (String args[]) {
      Bapi2 app = new Bapi2();
This is the error i'm getting...
com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: Connect to SAP gateway failed
Connect_PM  GWHOST=<abc11.aa.abc23.company.com>, GWSERV=sapgw00, ASHOST=<abc11.aa.abc23.company.com>, SYSNR=00
LOCATION    CPIC (TCP/IP) on local host
ERROR       hostname '<abc11.aa.abc23.company.com>' unknown
TIME        Mon Jun 06 17:15:12 2005
RELEASE     640
COMPONENT   NI (network interface)
VERSION     37
RC          -2
MODULE      ninti.c
LINE        332
DETAIL      NiPGetHostByName2: hostname
            '<abc11.aa.abc23.company.com>' not
     at com.sap.mw.jco.rfc.MiddlewareRFC$Client.nativeConnect(Native Method)
     at com.sap.mw.jco.rfc.MiddlewareRFC$Client.connect(MiddlewareRFC.java:1098)
     at com.sap.mw.jco.JCO$Client.connect(JCO.java:2983)
     at MyProject.Bapi2.<init>(Bapi2.java:45)
     at MyProject.Bapi2.main(Bapi2.java:233)
Thx
PRadeep