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Hi @YK_10474275
I use PTC Knowledge Base Search and I've got a result
CS198791 RMI class loader disabled
In your specific case I guess that you just do not use correct java library from Windchill.
"wt.util.WTException" is a class from Windchill and this class can not be missing
This class is located in a folder > WTHOME/codebase/wt/util/
check your application if it has access to the class
PetrH