Unable to load model and results - Nastran in Altair HyperView Posted June 18, 2018 · Report reply I have run Nastan Sol400 calculation. However I am unable to load .dat model and .op2 files in HyperView. Nastran input deck was created using Beta CAE ANSA but this shouldn't be the issue. I am also able to pull out the model and result in Beta CAE Meta. Any suggestions?