It seems that you didn't assign AC model to the IC.
Hi, thanks for quick reply..
are you suggesting a AC model for Cap?
For assigning decoupling capacitor models, just click the menu Models->Assign decoupling-capacitor models.
Becasue you wanna run plane noise analysis, you should set AC model for the IC's power pin.
How does plane noise analysis tool know how much noise, such as crossover current, that your ICs generate? Some small parts provide power dissipation capacitance either directly or indirectly (slope of Icc vs.freq curve). But most big parts like FPGAs do not.
In other words how do you setup the input to this simulation?