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Unable to make connection to SAP using SAP's JCO in Linux environment

Posted on 2004-04-20
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Last Modified: 2012-06-27
Hi,
 I am trying to create a connection to SAP using the following piece of code

                                JCO.Client mConnection = null;
            try {
                  mConnection = JCO.createClient(this.client, // SAP client
                  this.userName.toUpperCase(), // userid
                  this.password.toUpperCase(), // password
                  this.language.toUpperCase(), // language
                  this.hostName, // application server host name
                  this.system); // system number
                  mConnection.connect();
            }catch (JCO.Exception jex) {
                  throw new Exception(jex.getMessage());
            }catch(Exception ex){
                  throw new Exception("Exception occured while creating Connection to SAP.");
            }

In windows I am able to connect to SAP system but when I execute the same in Linux environment I get the following exception.
               "Exception in thread main java.lang.ExceptionInInitializerError: JCO.classInitialize(): Could not load middleware layer 'com.sap.mw.jco.rfc.MiddlewareRFC' default_cpc_mode"


 If anyone has come across the same issue and have fixed it, please let me know. I am using JDK 1.4.2 / RedHat Linux 8.0 / sapjco-linuxintel-2.1.2

Thanks in advance,
Nimai
0
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Question by:nimaig
9 Comments
 
LVL 9

Author Comment

by:nimaig
ID: 10867708
Hi,
 I have tried this out and it doesn't help.

Thanks,
Nimai
0
 
LVL 30

Expert Comment

by:Mayank S
ID: 10867762
That error means that an unexpected exception has occurred in a static initializer during evaluation or in the initializer for a static variable. Do you have any static blocks {} ? Please post their code.
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LVL 30

Expert Comment

by:Mayank S
ID: 10867773
Also - could you please post the complete stack-trace? I have a feeling that there could be a nested "access denied".
0
 
LVL 9

Author Comment

by:nimaig
ID: 10867807
Hi,
I am pasting the stack trace of the exception I get when I run the java client.


Creating Connection using the following parameters : username -> TEST ; language -> EN ; client -> 840 password :TEST hostName 203.200.131.133
Exception in thread "main" java.lang.ExceptionInInitializerError: JCO.classInitialize(): Could not load middleware layer 'com.sap.mw.jco.rfc.MiddlewareRFC'
default_cpc_mode
        at com.sap.mw.jco.JCO.<clinit>(Unknown Source)
        at SAPAdapter.createConnection(SAPAdapter.java:138)
        at SAPAdapter.main(SAPAdapter.java:19)

Thanks,
Nimai
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10868925
Looks to me like you have missing dependencies. Make sure the class com.sap.mw.jco.rfc.MiddlewareRFC and possibly other thngs in that package is/are available on the system
0
 
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Accepted Solution

by:
objects earned 1500 total points
ID: 10872970
Is that the complete error message?
Can u also post the stack trace?

Did you make the shared libraries available under Linux?
0
 
LVL 30

Expert Comment

by:Mayank S
ID: 10876600
>> I am pasting the stack trace of the exception I get when I run the java client

I also asked for any code in static blocks ;-)

>> at SAPAdapter.main(SAPAdapter.java:19)

What is that line?
0
 
LVL 9

Author Comment

by:nimaig
ID: 10876763
Hi All,
 I have resolved the issue. I put the shared library files under /usr/lib directory. Thanks for all you help.


Thanks,
Nimai
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