Article - CS383482
Unable to start Windchill Method Server with error java.lang.NoClassDefFoundError: Could not initialize class wt.util.WTException in Windchill PDMLink
Modified: 18-Nov-2025
Applies To
- Windchill PDMLink 12.0.2.7 to 12.1
Description
- Unable to start Windchill Method Server after performing CPS Update from 12.0.2.6 to 12.0.2.7
- Below error is observed in Method Server logs :
ERROR [main] wt.method.server.startup.services - Failed to create: wt.services.service.60=wt.access.AccessControlManager/wt.access.StandardAccessControlManager java.lang.NoClassDefFoundError: Could not initialize class wt.util.WTException at wt.introspection.ClassInfo.getPropertyDescriptor(ClassInfo.java:1359) at wt.introspection.ClassInfo.mergePropertyDescriptor(ClassInfo.java:1926) at wt.introspection.ClassInfo.forceTopDownPropertyInitialization(ClassInfo.java:550) at wt.introspection.ClassInfo.getPropertyDescriptor(ClassInfo.java:1372) at wt.introspection.ClassInfo.mergePropertyDescriptor(ClassInfo.java:1926) at wt.introspection.ClassInfo.forceTopDownPropertyInitialization(ClassInfo.java:550) at wt.introspection.ClassInfo.getPropertyDescriptor(ClassInfo.java:1372) at wt.fc.ReferenceResolver.getPersistableTypeByIntrospection(ReferenceResolver.java:345) at wt.fc.ReferenceResolver.addTarget(ReferenceResolver.java:318) at wt.fc.ReferenceResolver.<init>(ReferenceResolver.java:109) at wt.fc.ReferenceResolver.<init>(ReferenceResolver.java:88)
- MethodServer fails with above error after upgrading Windchill from 12.0.2.0 to 12.1.2.0.
- After CPS update, getting below error in Method Server logs :
ERROR [main] com.ptc.core.lwc.server.StandardCustomTextModeledEnumService - Exception occurred during performStartupProcess wt.services.applicationcontext.UnableToCreateServiceException: Unable to create service named "com.ptc.core.custom.resource.delegate.MetadataResourceInfoEnumDelegate" with requestor "null" and selector "null". Nested exception is: java.lang.InstantiationException at wt.services.applicationcontext.UnableToCreateServiceException.<init>(UnableToCreateServiceException.java:99) at wt.services.applicationcontext.ACServicesAdapter.getService(ACServicesAdapter.java:217) at wt.services.applicationcontext.implementation.DefaultServiceProvider.getService(DefaultServiceProvider.java:132) at wt.services.applicationcontext.implementation.DefaultServiceProvider.getService(DefaultServiceProvider.java:190) at com.ptc.core.lwc.server.StandardCustomTextModeledEnumService.performStartupProcess(StandardCustomTextModeledEnumService.java:197) at wt.services.StandardManager.startup(StandardManager.java:459)
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