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DSCC / with Tomcat Server 6.0 Does not Start With Error: "java.lang.UnsupportedClassVersionError: Bad version number in .class file (unable to load class ... (" (Doc ID 1331436.1)

Last updated on OCTOBER 10, 2019

Applies to:

Oracle Directory Server Enterprise Edition - Version 6.0 and later
Information in this document applies to any platform.
***Checked for relevance on 16-May-2013***


Problem description
User has downloaded ODSEE 11g1R1 Zip distribution, and is using Tomcat 6.0.32 on Solaris SPARC S10 platform.

The user cannot start the DSCC.


Version: ODSEE (ZIP distrib)
OS: Solaris 10 SPARC
Tomcat version: 6.032


Note: This issue can occur with ODSEE on other operating systems.
Error Message
SEVERE: Error deploying web application directory dscc7 (catalina.out)

java.lang.UnsupportedClassVersionError: Bad version number in .class file (unable to load class

at org.apache.catalina.loader.WebappClassLoader.findClassInternal(


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In this Document
 Problem description
 Error Message
 1) Problem cause
 2) How to fix the issue
 3) What to do if further debugging is needed
 4) Windows

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