Ansys Your Product License Has Numerical Problem Size Limits Verified |work| -

This error occurs when your model's node or element count exceeds the capacity allowed by your specific Ansys license, a common restriction in free student and introductory academic versions. Standard License Limits

This isn't necessarily an error, but rather a confirmation that the software has checked your model size against the restrictions of your specific license tier. 1. Why Am I Seeing This? This error occurs when your model's node or

  1. Number of Nodes: For structural mechanics (Ansys Mechanical), the primary limiting factor is the number of nodes in your finite element mesh.
  2. Number of Cells/Elements: For CFD (Fluent, CFX) and electromagnetics (HFSS, Maxwell), the limit is often based on the total number of mesh cells or elements.
  3. Degrees of Freedom (DOFs): A more technical metric, this is roughly equivalent to Number of Nodes × Degrees per node (e.g., 6 for solid elements). High-frequency solvers may cap matrix size instead.

. This drastically reduces the node count while maintaining accuracy for thin-walled or long, slender structures. 3. Use Symmetry 512k nodes) or be unlimited.

count, but the highest Node ID. If you have gaps in your numbering, use the Compress Node Numbers tool in the Mesh Numbering menu. 3. How to Fix It (Without Buying a New License) slender structures. 3. Use Symmetry count

  1. Optimize your model: Refine your model to reduce the number of elements, nodes, and DOFs while maintaining solution accuracy.
  2. Use more efficient meshing techniques: Employ more efficient meshing techniques, such as adaptive meshing or mesh merging.
  3. Split large models: Divide large models into smaller sub-models, simulating each sub-model separately.
  4. Upgrade your license: Consider upgrading your license to a higher level or subscription-based plan with increased problem size limits.
  5. Use alternative software: Explore alternative software options that offer more generous problem size limits or more efficient solution methods.

Best Practice 2: Monitor Element Count During Meshing

Set an alert in Mechanical when nodes exceed 90% of your license limit. Use *GET, maxnode, PARM, NODE, NUM_MAX in an APDL command snippet.

The Difference Between "Enterprise" and "Academic" Limits

  • Commercial / Research Licenses: Often have no hard numerical limit (unlimited), but are limited by RAM and CPU cores (per core token limits).
  • Teaching Licenses (TTU): Typically capped at very small sizes (e.g., 32k nodes or 16k cells) for instructional use only.
  • Academic Research Licenses: May have moderate limits (e.g., 512k nodes) or be unlimited.