** ERROR IN PART (PROPERTY) IN PART NB 1 PROPERTY SET NB 1 DOES NOT EXIST

Hello, everyone.

I am a new student learning how to use Hyperworks Block Format to make thermal expansion simulation.

Sorry to write mails to bother you.

I just want to make a thermal expansion simulation.

First I used MAT1 and checked the /HEAT/MAT.

Second I used the /Therm_Stress/MAT as the property. ( /Therm_Stress/MAT can be only chosen in Property.)

I also used the imposed temperature for part of my model.

But After setting the engine file tool, I got the error below.

** WARNING IN MATERIAL DEFINITION
.. NODES
ERROR id : 178
** ERROR IN PART (PROPERTY)
IN PART NB 1
PROPERTY SET NB 1 DOES NOT EXIST
** ERROR TRAPPED : REPORT TO LISTING FILE
** ERROR TRAPPED

What does this mean? What is the Property Set NB 1?

Thank you so much.

Best wishes.