Expert Knowledgebase
Java/SAP development with Austin Sincock
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RFC and BAPI differential
(01 SEP 2006)
What is the difference between a BAPI and an RFC?
Data storage in an SAP table through JCo
(01 SEP 2006)
How do I store data in an SAP table through JCo after I have populated the JCo.Function instance with the appropriate objects?
Permission exceptions with JCo
(01 SEP 2006)
How do I deal with this exception:
com.sap.mw.jco.JCO$Exception: You are not authorized to logon to the target system?
RFC and BAPI function identification
(01 SEP 2006)
How do I identify a BAPI/RFC to perform a specific function in SAP?
How to call a JCo through a Java applet
(09 JUL 2006)
Executing a Java applet throws an exception when run through Internet Explorer. In the Eclipse environment, the applet works perfectly; logs on to R/3 with my user I.D. and password and executes a simple functi...
Retrieving parameters for a remote function module using JCo connector
(09 JUL 2006)
How do I retrieve a list of parameters for a specific remote function module using SAP's JCo connector?
Resolving JCO_ERROR_CONCURRENT_CALL in JCo
(09 JUL 2006)
How do I resolve the error "JCO_ERROR_CONCURRENT_CALL" when running SAP JCo in a Web application?
Here is the exception report:
com.sap.mw.jco.JCO$Exception: (132) JCO_ERROR_CONCURRENT_CALL: Concurrent call...
How to invoke a Web service from SAP using a JCo server
(09 JUL 2006)
How do I invoke a Web service from SAP using a JCo server?
What range of ports does JCo use when accessing SAP?
(09 JUL 2006)
What range of ports does JCo use when accessing SAP?
Can I use SAP JCo on an unsupported operating system?
(09 JUL 2006)
Can I use SAP JCo on the IBM OS 4690 operating system?
Learn how to build a Java Web Application for SAP
(20 DEC 2005)
How can I access an SAP table using query_table through JSP? Please give me some code to access this. I am new to SAP but not to Java.
Best places to learn the basics of SAP and Java development
(20 DEC 2005)
Are there any sites that would allow me to learn Java/SAP development for free?
Avoid directly calling a JCo connection from a JSP
(20 DEC 2005)
We are using SAP EP6 (NetWeaver). We are using ASP code to call an RFC in SAP. It was working fine, but for some reason, we are planning to use JSP code for the same. I created sample JSP code just for testing ...
Workaround for an error connecting to SAP using SAPjco.jar
(20 DEC 2005)
When I connect to my SAP system from a Java application using SAPjco.jar, it throws the following exception:
"103) RFC_ERROR_LOGON_FAILURE: You are not authorized to logon to the target system (error code 1)...
Is SAP JCo compatible with Unix?
(20 DEC 2005)
Is SAP JCo compatible with Unix? Our Java application runs in a Unix server and we'd like to know if there be any rifts if we use JCo with that application.
Also, please let me know if JCo is compatible with ...
Can I use JCo for outbound connectivity from SAP to a Java object?
(20 DEC 2005)
Can I make a Java function call in SAP -- either in an RFC, a BAPI or BADI -- and pass parameters?
Intro to portal development
(08 JUL 2005)
I am an ABAP programmer who would like to move into portal development. Where
should I start?
BSPs vs. Java/JCo
(08 JUL 2005)
When should I use BSPs (Business Server Pages) and when should I connect
with Java/JCo to SAP?
Using a Smart Form for an internal employee information
(08 JUL 2005)
I am having a problem creating a Smart Form. I pass an internal table with a few employee numbers, but I do not know how to loop at this internal table from the Smart Form. FYI, this internal table has a few li...
How can a Java application pass data to an SAP table using JCo?
(08 JUL 2005)
How can a Java application pass data to an SAP table using JCo?
Accessing the NetWeaver Developer Studio
(08 JUL 2005)
How can I get SAP NetWeaver Developer Studio to develop my skills for educational purposes?
Is WebDynpro for both Java and ABAP?
(08 JUL 2005)
Is SAP WebDynpro solely based on ABAP? Is Enterprise Portal based on Java? Do you see .NET moving into portals in SAP in the future?
Developing complex Web applications for a move to R/3
(08 JUL 2005)
We are about to move from R/2 to R/3 and at the same time we're developing complex Web-based applications to communicate with our ABAP application that will have to be reshaped too. Should we use XI, turn these...
Beginner information for building interactive forms
(08 JUL 2005)
I need more information about building interactive forms in SAP NWDS. I am looking for installation requirements, sample applications, examples, shortcuts, etc.
Error connecting to SAP in Linux
(10 FEB 2005)
I am trying to create a connection to SAP using the following piece of code:
JCO.Client mConnection = null;
try {
mConnection = JCO.createClient(this...
JCo connection pooling
(10 FEB 2005)
I am using JCO to call BAPIs. I want to use connection pooling to increase performance. Please give me some guidelines on how to use connection pooling.
Updating an external database from SAP
(10 FEB 2005)
Can you tell me how to find which RFC should be used for specific table update?
Implementing custom dropdown values in a JSP
(10 FEB 2005)
Well my problem is trivial but I am not able to decide on exact implementation, as I am new to using JCo.
Well I have a JSP page that has radio buttons. User selects one of them and the page should automatica...
Can I update an SAP table from a Java program?
(10 FEB 2005)
Is it possible to update an SAP table from a Java program?
What do I do when Tomcat throws an exception?
(10 FEB 2005)
What do I do when Tomcat throws the following exception?
An unexpected exception has been detected in native code outside the VM.
Unexpected Signal: EXCEPTION_ACCESS_VIOLATION occurred at PC=0x78010AA8 Functi...
Can I download the JCo toolkit or the RFCSDK?
(10 FEB 2005)
Where can I download RFCSDK? In http://services.sap.com it requires a login account. Is this SDK freeware? If not, what kind of license does it have?
What role will a Java developer have in the SAP world?
(21 JUN 2004)
Can you tell us what in your opinion will be the main working area for
Java developers inside the SAP environment? Will Java development be
restricted to the webside only, or is changing client windows, or
int...
Java code for mySQL database
(21 JUN 2004)
What is a Java code that allows you connect to a mySQL database?
How to self-learn Java?
(21 JUN 2004)
I am an ABAP Developer. With the latest developments in SAP Web
Application Server, I feel I need to learn Java. Which is the best way to
SELF learn Java i.e. whatever is required for SAP Web Application
devel...
Will Java be coded into ABAP?
(21 JUN 2004)
Will Java be coded into ABAP? How will this work? Are there any papers or
books on this subject?
Running ABAP programs through a Java-based interface
(21 JUN 2004)
I have to develop a Web-based application using IBM Websphere Application
Server that accesses SAP using J2C connectors. My problem is that I need to
run ABAP programs that access (update/insert/delete) custom...
Creating exe-files for IBM PC
(21 JUN 2004)
How can we create an exe-file of Java code for IBM PC?
A tricky password problem
(21 JUN 2004)
I am working on a project using JCo and I am calling the
BAPI_CUSTOMER_CHECKPASSWORD function module to validate the input customer
and password. First of all I created an Internet user ID, type = 'KNA1',
and ...
Listing optional parameters of a table or structure
(21 JUN 2004)
I would like to list the optional parameters of a table or structure of
a particular BAPI. I have tried using is Optional method but in vain.
Can you tell me if there any other way to know whether the Field...
SAP's Web Application Server 6.2 vs. BEA's WebLogic
(21 JUN 2004)
How do you rate WAS 6.2 from SAP compared to WebLogic from BEA?
The difference between ITS and WAS
(21 JUN 2004)
Could you briefly describe the difference between the ITS and WAS? Is
the WAS just a later version? Why would I use one or the other? The R/3
system we have is 4.6B.
Examples of Java making RFC calls
(21 JUN 2004)
I'm a novice when it comes to Java, but I'm keen to learn more about the
language. Do you have any examples of a Java program that makes an RFC call
to SAP to get some data? Ideally, an example that makes a c...
Calling standard reports/transactions using JCo
(21 JUN 2004)
Is there any method using which I can call standard SAP reports /
transactions USING JCo?
Different ways of communicating with SAP through Java
(21 JUN 2004)
What are the different ways of communicating with SAP through Java? Which is preferable?
How to communicate with BAPIs from JSP
(21 JUN 2004)
I am doing a Web-enabled application that requires getting data from SAP.
Could you please tell me how I can connect to SAP or communicate with
BAPIs from JSP? All my web pages are in JSP and the business logi...
Using native database calls to SAP using SQL
(21 JUN 2004)
How can we interact with other databases instead of native
SAP databases like Oracle SQLserver or MS Access? Please give me the code.
Can JCo create an ABAP report in SAP?
(21 JUN 2004)
I want to know what the JCo can do. Can it create an ABAP report in
SAP, if all the code and parameters are provided?
Java training for INQMY
(21 JUN 2004)
Do you know if SAP will offer some kind of Java training to enable implementation teams to work with INQMY? Also, will CRM use BSP or JSP in Release 4.0?
Licensing issues with Internet users
(21 JUN 2004)
I read a reply of yours to someone who was testing Internet User passwords in SE37. The site I am working on is considering developing an Intranet application using SAP Internet users (SU05). Not wanting to st...
Java-enabling an SAP application without a BAPI
(21 JUN 2004)
I am using JCO to interact with SAP.
In that I need to create one Sevice Contract from Java application by calling a BAPI. But the SAP system doesn't have the related BAPI to create the contract. Is it necessa...
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