Bare Die LTspice model_Tj can not be left floating

StephenLML

Currently, I am working with the LTspice model of Bare Die, such as CPM2-1200-0040B. According to the Wolfspeed SiC MOSFET LTspice Model Quick Start Guide，the Junction Temperature terminal(Tj) can be left floating. However，it can not work with the floating Tj. How can I solve this problem? Because I don't want to keep it constant through an external voltage source.

Thanks!I really appreciate any help you can provide.