Academy

Troubleshooting

Common problems and how to fix them

• Nonlinear ConvergenceWhy the nonlinear solver fails to converge and how to fix it.
• Mesh ErrorsWhy meshing fails or flags low quality, and what you can actually change.
• Contact ErrorsWhat a valid contact definition needs, and why a contact result may be unavailable.
• Implausible ResultsStresses too high, too low, or physically nonsensical, here are the most common causes.
• Singularity WarningDr.Q reports a suspected singularity or a mesh-dependent result. What it means and what to do.
• Ineffective Boundary ConditionsA boundary condition you defined did nothing, or the solve rejected it. Why, and how to fix it.
• Location ProblemsA location selected nothing, or its type doesn't support what you asked. Why, and how to fix it.
• Material ProblemsA plasticity solve failed, or a viscoelastic material was used without a time definition. Why, and how to fix it.
• Modal Analysis ErrorsA modal analysis was rejected or did not converge. Why, and how to fix it.
• Buckling ErrorsA buckling analysis was rejected or produced no positive load factors. Why, and how to fix it.
• Geometry ErrorsThe CAD geometry could not be imported, validated, or meshed. Why, and how to fix it.
• Compute Time & MemoryWhy your simulation takes too long or runs out of memory, and how to fix both.