Solver message 99771
Message text
** ERROR 99771 ** The study file (*.sdy) is corrupt. The occurrence number for element element number is unknown. Export the model to Patran (*.pat) or Moldflow (*.mfl) format and import it again.
Explanation
The study file is missing some required element property information.
Resolution
Export and then import your model using Patran (*.pat) or Moldflow (*.mfl) format.