I get this message at random times even with sensible material properties.
It seems to occur most often when taking an existing material as a starting point, copying it and then editing the copy.
I may only change the E and nu slightly but it insists that this parameter PTC_TENSILE_YIELD_STRESS is not defined.
So I give up and define the material from scratch and the s/w is happy.
I have been meaning to file a call for a while.