I am using Windchill PDMLink Release 12.1 and Datecode with CPS 12.1.0.1
Digital Product Traceability established between Windchill and Codebeamer. OSLC connection is based on Thingworx. So each time a user want to add trace in Windchill she/he has to enter Thingworx login information which is unapplicable in customer's case.