PTC Windchill 10.2 F000 JCA Exception

Hi,

I have recently installed PTC Windchill 10.2 F000.

While untill recently i was able to navigate to Preference Management window in Utilities, today I am not able to do so.

I get the following error :

ERROR : com.ptc.jca.error wcadmin102 - ---------- JCA Exception ----------javax.servlet.jsp.JspException: java.lang.NoSuchMethodError: com.ptc.jca.json.table.TableConfigHolder.toJSONString()Ljava/lang/String;

can some one please help ? as  a last resort i will have to take the pains to re install everything all over again .

- kazi.