Hi @Ge Zhu,
Transient FEA input data is the additional information that RMXprt passes to Maxwell when a 2D or 3D FEA model is created from RMXprt.
It seems RMXprt cannot generate this data for the machine type you selected.
You can run another design or an example model to see what this data includes. and you can manually input this data in Maxwell as required.
Regards,
Navya