Strange errors using JCo / differences in JCo versions

[Former Member]

Hi there,

I have a small java programm that calls a few function modules using JCo (stand alone version). The programs work fine until here.

Now I'm trying to migrate the solution to WAS Java 700 and I get a strange error from the WAS:

java.lang.NoClassDefFoundError: com/sap/mw/jco/JCO$Record

I suppose, that the problem depends on the sapjco.jar file shipped with WAS 700.

I tried to reproduce the error with the NWDS by adding jrfc.jar from the variables to the build path or by adding <NDWS>\eclipse\plugins\com.sap.mw.jco_2.0.0\lib\sapjco.jar instead of the standalone version.

I can not reproduce the error itself, but after changing the jar file in NWDS I get an error like:

java.lang.NoClassDefFoundError at com.sap.mw.jco.MiddlewareJRfc$Client.connect(MiddlewareJRfc.java:982)

Has anybody an idea what goes wrong and why the application is no longer working the JCo in WAS

Best regards,

Markus

[Former Member]

Meanwhile I solved the Java WAS problem. There is an OSS note with a new version of jrfc.jar.

The problem in NWDS still persists. Here it only works if you use the standlone version of JCo.