There are three ways to specify temperature in simultions in Spectre Cadence.

1. Change trise of the deivce in its properties
2. Change temperature in setup->temperature in ADE
3. Change dtemp in model file

What are the differences between all these ?
-CA

If you're trying to get all the devices in your circuit, then 2 is the most efficient, because it's one change.  3 requires a change for every model, 1 requires a change for every instance.  However, if you want different instances to have different temperatures, then 1 is your only option.

For a bug-free simulator, all three should give the same answer.

That sounds like a bug to me.  Can you try options 1 and 2 on just a single transistor and check the id-vd plot?

Hmm, now I'm remembering ... in at least one foundry model library, I think I saw the circuit temperature used in the subckt, and maybe trise was omitted from the formula. (I think the temperature update equation was more complicated than what's available built into the resistor or something.)

I'd suggest just a sanity check on the transistors with the id-vd plot, then try the resistors, or open the model library file in a text editor and look at those subckts.