Scenario 4:JCo finds the wrong version of the librfc library

Scenario 4:JCo finds the wrong version of the librfc library

Exception: Exception in thread "main" java.lang.ExceptionInInitializerError: JCO.classInitialize(): Could not load middleware layer 'com.sap.mw.jco.rfc.MiddlewareRFC' JCO.nativeInit(): Could not initialize dynamic link library librfc. Found version "620.0.1132" but required at least version "640.0.59". at com.sap.mw.jco.JCO.<clinit>(JCO.java:735)

Cause: This exception occurs when the installed version of librfc32.dll is out of date with the currently installed versions of sapjcorfc.dll and sapjco.jar. Your workstation likely has an older version of librfc32.dll that came with the SAPGUI installation or even a very old version of JCo. Notice that the versions called out are mismatched roughly at the versions of two different versions of the SAP Web Application server, where the new 640.x version of sapjcorfc.dll is being used with a 620.x version of librfc32.dll.

Resolution: Extract librfc32.dll from the current version of the JCo archive. Copy this file to the Windows system directory i.e. c:windowssystem32. Again, this is the directory used by other SAP applications and should be used for the JCo connector, as well.

    Requires Free Membership to View

    Login

    When you register, you will start receiving targeted emails from my award-winning team of editorial writers. Our goal is to keep you informed on the hottest topics and biggest challenges faced by SAP professionals today.

    Hannah Smalltree, Editorial Director

    By submitting your registration information to SearchSAP.com you agree to receive email communications from TechTarget and TechTarget partners. We encourage you to read our Privacy Policy which contains important disclosures about how we collect and use your registration and other information. If you reside outside of the United States, by submitting this registration information you consent to having your personal data transferred to and processed in the United States. Your use of SearchSAP.com is governed by our Terms of Use. You may contact us at webmaster@TechTarget.com.


TROUBLESHOOTING JCO EXCEPTIONS

 Home: Introduction
 Scenario 1: JCo is unable to find the RFCDSK API library in the system path
 Scenario 2: JCo is unable to find the JCORFC library in the system path
 Scenario 3: JCo cannot load its RFC middleware layer (3 exceptions)
 Scenario 4: JCo finds the wrong version of the librfc library
 Scenario 5: JCo exceeds the number of SAP-allocated work processes
 Scenario 6: Installing/porting JCo to other operating systems
 Review: Conclusion and more resources

This was first published in June 2005