Java Connector 3.0.4 Problem: JCo Library not load...

Former Member · ‎01-23-2010

Hi All,

We have a problem with the Java Connector, version 3.0.4, on Windows Server 2003 64bit: JCo Library is not loaded, UnsatisfiedLinkError

Environment: Windows Server 2003 R2 Datacenter x64 Edition

Java JDK: Installed from jdk-6u18-windows-x64.exe, downloaded on 23/01/2010

java version "1.6.0_18"

Java(TM) SE Runtime Environment (build 1.6.0_18-b07)

Java HotSpot(TM) 64-Bit Server VM (build 16.0-b13, mixed mode)

SAP JCo Connector: sapjco3-NTAMD64-3.0.4.zip, downloaded on 23/01/2010

Visual C++ version of msvcr.dll: 8.0.50727.762 and 8.0.50727.3053, service pack 1 installed on 23/01/2010

sapjco3.jar and sapjco3.dll were moved into the same folder, CLASSPATH, PATH and JAVA_HOME variables were set accordingly.

The command java -jar sapjco3.jar yields an error on the JCo library in the About screen as follows:

(JCo Library) not loaded, caused by java.lang.UnsatisfiedLinkError: PATH\sapjco3.dll: This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem.

Manifest-Version: 1.0

Ant-Version: Apache Ant 1.6.4

Created-By: 1.5.0_14-b03 (Sun Microsystems Inc.)

Specification-Title: SAP Java Connector v3

Specification-Version: 7.30.1

Specification-Vendor: SAP AG, Walldorf

Implementation-Title: com.sap.conn.jco

Implementation-Version: 20091217 0547 (7.30.1 (2009-12-10))

Implementation-Vendor-Id: com.sap

Implementation-Vendor: SAP AG, Walldorf

Main-Class: com.sap.conn.jco.rt.About

This is the log from running the java command:

java.lang.UnsatisfiedLinkError: PATH\sapjco3.dll: This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem

at java.lang.ClassLoader$NativeLibrary.load(Native Method)

at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1803)

at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1728)

at java.lang.Runtime.loadLibrary0(Runtime.java:823)

at java.lang.System.loadLibrary(System.java:1028)

at com.sap.conn.jco.rt.DefaultJCoRuntime.loadLibrary(DefaultJCoRuntime.java:441)

at com.sap.conn.jco.rt.DefaultJCoRuntime.registerNativeMethods(DefaultJCoRuntime.java:307)

at com.sap.conn.jco.rt.JCoRuntime.registerNatives(JCoRuntime.java:987)

at com.sap.conn.rfc.driver.CpicDriver.<clinit>(CpicDriver.java:948)

at com.sap.conn.rfc.engine.DefaultRfcRuntime.getVersion(DefaultRfcRuntime.java:43)

at com.sap.conn.rfc.api.RfcApi.RfcGetVersion(RfcApi.java:259)

at com.sap.conn.jco.rt.MiddlewareJavaRfc.<clinit>(MiddlewareJavaRfc.java:200)

at com.sap.conn.jco.rt.DefaultJCoRuntime.initialize(DefaultJCoRuntime.java:73)

at com.sap.conn.jco.rt.JCoRuntimeFactory.<clinit>(JCoRuntimeFactory.java:23)

at com.sap.conn.jco.rt.About.<init>(About.java:40)

at com.sap.conn.jco.rt.About.main(About.java:74)

java.lang.ExceptionInInitializerError: Error getting the version of the native layer: java.lang.UnsatisfiedLinkError: PATH\sapjco3.dll: This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem

at com.sap.conn.jco.rt.MiddlewareJavaRfc.<clinit>(MiddlewareJavaRfc.java:212)

at com.sap.conn.jco.rt.DefaultJCoRuntime.initialize(DefaultJCoRuntime.java:73)

at com.sap.conn.jco.rt.JCoRuntimeFactory.<clinit>(JCoRuntimeFactory.java:23)

at com.sap.conn.jco.rt.About.<init>(About.java:40)

at com.sap.conn.jco.rt.About.main(About.java:74)

Apparently, the error UnsatisfiedLinkError has been reported quite frequently. However, I haven't found a solution to this problem on the web yet.

I have tried the same files on a Windows Vista Business 64 bit machine as well with a slightly different error (different explanation for the UnsatisfiedLinkError).

Any help would be much appreciated!

Thanks in advance,

Axel

Former Member · ‎01-24-2010

Hi Axel,

hhhmm, this might be a problem due to usage of 3.0.4 and missing updates to Microsoft runtime libraries; check my comments in . You might have done this already.

As far as I remember another cause can be on 64bit due to usage of mixed library versions (e.g. trying to run it in 64bit, but some libraries are actually 32bit or vice versa). Having said that, I'm now actually confused, because I thought that JCo still requires the librfc dll. However, on my Windows 7 box (64bit), I can actually do RFC calls without any librfc. I noticed that the command java -jar sapjco3.jar now shows me a JavaRfc in the JCo Middleware name field with a JCo Middleware version of 2.2.1. I tried to do some search on that, but couldn't find anything.

Thus if you have installed the latest Microsoft runtime libraries, I'm not sure what might be the problem. If you have access to a previous JCo3 version, you might want to try that...

Java Connector 3.0.4 Problem: JCo Library not loaded, UnsatisfiedLinkError

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