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Portal 7.30 Restore - NWA error: java.lang.ClassNotFoundException

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Dear experts,
I'm facing the same problem as described this discussion: http://scn.sap.com/message/13629823#13629823
Just not in PI but in a Portal.
We implemented patches into a 7.30 Java Portal test system and the customer reuqested a restore to the old patchlevel for he had application problems with the new patchlevel.
So we restored DB and files and the Portal application itself seems to work properly.
Only NWA and everthing depending on NWA (like SystemInfo etc.) doesn't work due to the following error:
500   Internal Server ErrorSAP NetWeaver Application Server/Java AS

The initial exception that caused the request to fail, was:

java.lang.ClassNotFoundException: com$sap$tc$lm$co$ui$nwa$localnavigation$repository$NWAProfessionalApplication ------------------------- Loader Info ------------------------- ClassLoader name: [sap.com/tc~lm~itsam~ui~mainframe~wd] Loader hash code: 9fa5a2f Living status: alive Direct parent loaders:   [system:Frame]   [interface:webservices]   [interface:cross]   [interface:security]   [interface:transactionext]   [library:webservices_lib]   [library:opensql]   [library:jms]   [library:ejb20]   [service:p4]   [service:ejb]   [service:servlet_jsp]   [library:com.sap.base.technology.facade]   [library:tc~cmi]   [sap.com/tc~lm~webadmin~mainframe~persist~ear]   [sap.com/tc~wd~api]   [sap.com/tc~js~nwa~nav_engine~ear]   [sap.com/tc~lm~itsam~ui~proxy]   [sap.com/tc~wd~restricted]   [service:engine.dsr.facade]   [sap.com/tc~lm~webadmin~mainframe~wd]   [sap.com/tc~lm~itsam~co~ui~nwa~localnavigation~wd] Resources:   /usr/sap/PD1/J20/j2ee/cluster/apps/sap.com/tc~lm~itsam~ui~mainframe~wd/servlet_jsp/webdynpro/resources/sap.com/tc~lm~itsam~ui~mainframe~wd/root/WEB-INF/lib/sap.com~tc~lm~itsam~ui~mainframe~wd.jar ---------------------------------------------------------------

    at com.sap.engine.boot.loader.MultiParentClassLoader.loadClass(MultiParentClassLoader.java:278)

     at com.sap.engine.boot.loader.MultiParentClassLoader.loadClass(MultiParentClassLoader.java:247)

     at com.sap.dictionary.runtime.JavaType.getClass(JavaType.java:189)

     at com.sap.dictionary.runtime.JavaType.retrieveClass(JavaType.java:209)

     at com.sap.dictionary.runtime.JavaType.<init>(JavaType.java:55)

     ... 60 more

What we already did to try to solve/analyze this problem is:
  • renaming server0 to get it rebuilt
  • trying out different sap jvm patches of jvm 6
    patch 18, 33, 57 were the one's we still had - the system originally ran on 33 - after patches on 57 - after the restore we switched back to 33
  • checked if the above mentioned jar file is exiting (it is and it has exactly the same size as in the production system which is still working)
  • tested the application in Firefox (21) and Internet Explorer (10)

 

 

SAP note 1718566 recommends to implement the latest patch for LMNWAUIFRMRK which isn't quite an option for us because the whole reason for restoring was getting back to the old patchlevel...
In default trace we couldn't find any helpful information - you can find it attached.
I also attached a list of comparison between the original patchlevel and the newly implemented patches (which now has been restored to the original level).
Do you have any idea how to solve this issue?
Many thanks and best wishes
Marie

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