Creo Simulate performs error checks when you select Info > Check Model on the Analyses and Design Studies dialog box. For each error it finds, Creo Simulate:

Unless otherwise indicated, these errors prevent you from starting a design study run.

Creo Simulate's error checks fall into three categories:

The error checking process does not include model repair. Creo Simulate reports only corruption errors related to modeling entities. If it encounters topological or geometric errors, Creo Simulate exits and returns you to Creo Parametric.