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Frequency domain analysis

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Hi to all.
I'm trying to perform an EIS with a 2d-axial revolution model. The model is composed of TCS-FP and second current distribution but when I try to activate the FP and TCS in the Frequency solver an orange triangle appears (perturbation in frequency domain).
I set one BC with Voltage (1 [V] ) and the other is set to 0[V] (ground). The voltage is harmonic with 5e-3[V] of amplitude but with the boundary probe I read only a const. value of the voltage=5e-3[V]. Why?
Another problem arise from the value of density of the mixtrures which changes and assume the value of the component with the higher mass fraction.
Thanks in advance to all.

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