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java.lang.ClassNotFoundException: de.bioassay.pla.assay.Assay	at serp.util.MultiClassLoader.findClass(MultiClassLoader.java:230)	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:242)	at kodo.runtime.PersistenceManagerFactoryImpl.loadPersistentClasses(PersistenceManagerFactoryImpl.java:208)	at kodo.runtime.PersistenceManagerFactoryImpl.getPersistenceManager(PersistenceManagerFactoryImpl.java:151)	at kodo.runtime.PersistenceManagerFactoryImpl.getPersistenceManager(PersistenceManagerFactoryImpl.java:104)	at kodo.runtime.PersistenceManagerFactoryImpl.getPersistenceManager(PersistenceManagerFactoryImpl.java:97)