could not initialize class jco

[mspakis]

sapjco3.jar / sapjco3.dll

version upgrade issue

windows server 2016 standard

Web Application Server : JEUS

Among the Java library files, sapjco3.jar file was upgraded. From 3.0.17version to 3.1.8 version.
However, the following error appears:

java.lang.NoClassDefFoundError: Could not initialize class com.sap.conn.jco.JCo

at com.sap.conn.jco.JCoDestinationManager.getDestination(JCoDestinationManager.java:56) ~[sapjco3.jar:20230711 2000 [3.1.8 (2023-07-11)]]

at com.jmech.zrfc.RFCProcess.createClient(RFCProcess.java:228) ~[classes/:?]

at com.jmech.zrfc.func.ZPM_NON_NRC_WORDER_SEARCH.<init>(ZPM_NON_NRC_WORDER_SEARCH.java:31) ~[classes/:?]

at com.jmech.zrfc.SapOrderManager.getZPM_NON_NRC_WORDER_SEARCH(SapOrderManager.java:255) ~[classes/:?]

at com.jmech.batch.SyncExternalDataBatchController.batchCall_ZPM_NON_NRC_WORDER_SEARCH(SyncExternalDataBatchController.java:1144) ~[classes/:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_101]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_101]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_101]

at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_101]

at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:64) ~[spring-context-3.2.18.RELEASE.jar:3.2.18.RELEASE]

at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:53) [spring-context-3.2.18.RELEASE.jar:3.2.18.RELEASE]

at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81) [spring-context-3.2.18.RELEASE.jar:3.2.18.RELEASE]

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_101]

at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_101]

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [?:1.8.0_101]

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [?:1.8.0_101]

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_101]

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_101]

at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]

Even though I set it to the same library location as before, this phenomenon occurs and I don't know why. Is this a java version issue?

[MarkusTolksdorf]

Hi, 

have you also updated the sapjco3.dll and followed the installation instructions for Windows? Note: On Windows you need to install the VS 2013 runtime redistributables in advance

Best regards,
Markus