Re: webtop migration issue (java.lang.UnsupportedClassVersionError: )

Hi Satish

Probably you have to uninstall Java1.4.1 runtime to get rid of the 
plug-in. Before you do that, you may explore the Advance Tab from that
plug-in control panel to see if you can specify a Java Runtime 
environment of 1.3.1.
Please also verify the settings for Tomcat. You may run a command 
similar to the following to check if your JAVA_HOME is really what 
you expected.
  __C:\Tomcat 5.0\bin>%JAVA_HOME%\bin\java -version__

I believe the reason for your problem was that some Java code was 
compiled in 1.3.1 and later it was running under 1.4.1.
The Tomcat JAVA_HOME and browser Plug-in are two JVMs used by Webtop.

The last thing you may try is to uninstall DFC5.3 and re-install 
DFC5.2 ( the one compatible with Webtop 5.2.1). But I suggest you only
go that far before you exhaust all the other options.
Good luck.
Xueqing
--- In documentum-users-hHKSG33TihhbjbujkaE4pw@xxxxxxxxxxxxxxxx, 
"satish_rudraraju" 
<satish_rudraraju@xxxx> wrote:
> Hi Xueqing,
> 
> Yes, there are two java plug-in, but 1.4.1 is already unchecked the 
> browser support, only 1.3.1 is checked for the browser support.
> 
> Any further advice?
> 
> Thanks
> Satish
> 
> --- In documentum-users-hHKSG33TihhbjbujkaE4pw@xxxxxxxxxxxxxxxx, "xueqingh" 
> <xueqingh@xxxx> 
> wrote:
> > Hi Satish,
> > You may go to "Control panel" to check if there are two Java plug-
> in 
> > Control panels. If you have the 1.4.1 panel, use it to uncheck 
the 
> > browser support. Supposedly, you should have the 1.3.1 panel, use 
> it 
> > to check the browse support. Then restart the browser and try 
again.
> > Hope it helps.
> > Xueqing
> > 
> > --- In documentum-users-hHKSG33TihhbjbujkaE4pw@xxxxxxxxxxxxxxxx, 
> > "satish_rudraraju" 
> > <satish_rudraraju@xxxx> wrote:
> > > Xueqing,
> > > 
> > > Thanks for the information.
> > > 
> > > 1) I tried by clearing browser cache, but still the same error.
> > > 
> > > 2)It is showing single Java plug-in (i.e., v1.3.1_06)to select 
in 
> > IE 
> > > Tools->Internet Options->Advanced->Java(Sun). 
> > > 
> > > but when i click Tools->java console in the browser it is 
showing 
> > > diff version as below(Tools->Java console option is available 
in 
> > our 
> > > browser)
> > > 
> > > Java(TM) Plug-in: Version 1.4.1_02
> > > Using JRE version 1.4.1_02 Java HotSpot(TM) Client VM
> > > User home directory = C:\Documents and Settings\Satish
> > > Proxy Configuration: No proxy
> > > 
> > > 
> > > 
> > > Any other suggestion
> > > 
> > > Thanks
> > > Satish
> > > 
> > > --- In documentum-users-hHKSG33TihhbjbujkaE4pw@xxxxxxxxxxxxxxxx, 
> > > "xueqingh" 
> <xueqingh@xxxx> 
> > > wrote:
> > > > Hi Satish,
> > > > 
> > > > You may check the Java plug-in. Select the correct Plug-in 
from 
> > IE-
> > > > >Tools->Internet Options->Advanced->Java(Sun).
> > > > It is also a good idea to clear the browser Cache.
> > > > Pls let me know if it hopes or not.
> > > > Xueqing
> > > > 
> > > > --- In documentum-users-hHKSG33TihhbjbujkaE4pw@xxxxxxxxxxxxxxxx, 
> > > > "satish_rudraraju" 
> > > > <satish_rudraraju@xxxx> wrote:
> > > > > Hi All,
> > > > > 
> > > > >  
> > > > > 
> > > > > I have an issue after migrating webtop.
> > > > > 
> > > > > Scenario:
> > > > > >I have a windows2000 box and it has installation of 
> > webtop5.2.1 
> > > on 
> > > > > Tomcat4.0.6.
> > > > > 
> > > > > >Took the backup of C:\Program Files\Documentum & 
> > C:\Documentum, 
> > > > > since webtop up gradation also upgrades the DFC version
> > > > > 
> > > > > >Installed another instance of Tomcat5.0.28 and installed 
> > > Webtop5.3 
> > > > > on the same box and changed JAVA_HOME environ variable to 
> > > > > j2sdk1.4.1_02 
> > > > > 
> > > > > Webtop5.3 is working fine
> > > > > 
> > > > >  
> > > > > >Now restored the backup folders C:\Program 
Files\Documentum 
> & 
> > > > > C:\Documentum, and JAVA_HOME environ variable is changed 
back 
> > to 
> > > > > jdk1.3.1_06
> > > > > 
> > > > > >when I try to execute the webtop5.2.1, it is throwing the 
> > below 
> > > > > error, I think it is referring to old DFC classes somewhere 
> > even 
> > > if 
> > > > I 
> > > > > replaced the old Documentum\Shared folders and restarted 
the 
> > > Tomcat.
> > > > > 
> > > > > If anyone suggest me how to rectify this error that will be 
> > > helpful.
> > > > > 
> > > > >  
> > > > > Thanks in advance.
> > > > > Satish
> > > > > 
> > > > > 
> > > > > type Exception report
> > > > > 
> > > > > message Internal Server Error
> > > > > 
> > > > > description The server encountered an internal error 
> (Internal 
> > > > Server 
> > > > > Error) that prevented it from fulfilling this request.
> > > > > 
> > > > > exception:
> > > > > javax.servlet.ServletException: Error instantiating servlet 
> > class 
> > > > > com.documentum.web.formext.component.ComponentDispatcher
> > > > >        at 
org.apache.catalina.core.StandardWrapper.loadServlet
> > > > > (StandardWrapper.java:895)      
> > > > > 
> > > > > 
> > > > > root cause:
> > > > > java.lang.UnsupportedClassVersionError: 
> > > > > com/documentum/fc/common/DfException (Unsupported 
major.minor 
> > > > version 
> > > > > 48.0)
> > > > >        at java.lang.ClassLoader.defineClass0(Native Method)





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