Need help on JCo

[Former Member]

Hi,

I am getting error message while running JCo java code. I followed the given steps in the installation guide. I know i did something wrong in this.

I created a folder C:\JCO and unzipped the downloaded JCo files librfc32.dll, sapjcorfc.dll and sapjco.jar.

Copied the file librfc32.dll from C:\JCO directory to C:\WINNT\SYSTEM32

Added the path c:\JCO\sapjco.jar; in the environmental variables. [I followed the following --> Right Click on My Computer --> Properties --> Advanced --> Environment Variables --> Edited the existing path and added with java path like C:\j2sdk1.4.2_05\bin;c:\JCO\sapjco.jar;].

After this I am trying to execute the following code. It is copiling without any problem and giving error message while run mode.

C:\JCO>java Bapi1

Exception in thread "main" java.lang.NoClassDefFoundError: com/sap/mw/jco/JCO$Structure

******java code*****

import com.sap.mw.jco.*;

public class Bapi1 extends Object {

JCO.Client mConnection;

JCO.Repository mRepository;

public Bapi1() {

try {

// Change the logon information to your own system/user

mConnection =

JCO.createClient("020", // SAP client

"myuserid", // userid

"****", // password

"EN", // language

"myerp server host name", // application server host name

"00"); // system number

mConnection.connect();

mRepository = new JCO.Repository("SAPJCo", 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");

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");

function.getExportParameterList().

setActive(false, "COMPANYCODE_ADDRESS");

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[]) {

Bapi1 app = new Bapi1();

}

}

[Former Member · Accepted solution]

Hi Venu,

You have to add the java library sapjco.jar to the java classpath instead of the system classpath. You can do this by adding the -cp or -classpath parameter to your java call. So then you would get:

java -classpath C:JCOsapjco.jar Bapi1

Hope this helps,

Johan