com.sap.mw.jco.MiddlewareJRfc$Client.connect

[Former Member]

In the procees of making a RFC call from a Java application in NWDS 7.1, i am using the following jarsfor establishing JCO connection and to call the RFC,

u2022 Jdsr.jar

u2022 Jrfc.jar

u2022 SAPmdi.jar

u2022 i18n_cp.jar

u2022 aii_proxy_rt.jar

u2022 aii_util_misc.jar

I have created an external library DC in which i have created two public parts of types compilation and assembly and have included all these jars.And have created a dependency to the library DC in my ejb DC. But still the RFC call fails during runtime. The exception that i encounter when i run the Java application is,

java.lang.NoClassDefFoundError

at com.sap.mw.jco.MiddlewareJRfc$Client.connect(MiddlewareJRfc.java:1018)

at com.sap.mw.jco.JCO$Client.connect(JCO.java:3255)

Please advice. Any pointers on this would be highly appreciated.

Thanks,

Agila

Please advice.

[Former Member]

Dear Agilandeswari,

Please take the time to confirm if the solution provided helped you.

I noticed that you have not closed any of your other messages either.

This helps everyone else when they run into a similar issue.

Thanks,

Shimon

[Former Member]

Hi Agila,

There are 2 kinds of JCO implementations with a compatible API. One

is the so called standalone installation for runtime environments

outside of a SAP J2EE Engine environment. This implementation

is bundled in the sapjco.jar archive.

The other one is only for use within the SAP J2EE Engine and bundled

in the jrfc.jar archive.

Neither of these implementations will work in both environments. You have

to choose one accordingly.

Your stack trace shows the class MiddlewareJRfc which indicates that the jrfc.jar

package is being used, as of course you indicated here.

If you are running outside the SAP J2EE Engine, this can't work.

Please switch over your environment to the JCo standalone enviroment

and use the sapjco.jar instead.

Hope this helps.

Regards,

Shimon Zafrir

SAP Active Global Support