Ansys Your Product License Has Numerical Problem Size Limits Verified Jun 2026
Ansys Academic and Student versions have built-in constraints to ensure the software is used for educational purposes rather than heavy industrial work. Ansys Student (Introductory): Typically limited to 32,000 nodes/elements for Structural (Mechanical) simulations and 512,000 cells/nodes for Fluid Dynamics (Fluent). Newer versions may allow up to for structural or nearly for CFD, but these vary by release. University Licenses: Limits vary by tier, such as for Intermediate, for Advanced, and for Research licenses.
ansysXX -dis -b -m 4 -i input.dat -o output.out
This forces Ansys to use a smaller, user-defined node ID for the pilot node. If the first attempt doesn't work, try an even lower number like 500 to stay well within the node cap.
When contact definitions or remote points are used, the node numbering scheme can jump to much higher numbers than what is shown in the mesh details. This means even a model with relatively few nodes can have a node ID exceeding the limit and trigger the error.
Instead of a fine global mesh, use a coarse global mesh and apply or Inflation Layers only where the gradients are high (like at a bolt hole or a wing's leading edge). 4. Moving Beyond the Limits University Licenses: Limits vary by tier, such as
If you are a student and these methods do not work, your model may be too complex for the Student license, and you may need to speak to your university about access to a higher-level Ansys Academic Research license.
The specific limits depend on the version and type of analysis you are performing: Analysis Type Limit (Nodes/Elements) Structural (FEA) 32,000 – 128,000
Sometimes the error manifests in confusing ways. One user ran a model with 559,995 elements and 782,941 nodes, well above typical student limits, and it ran fine initially before suddenly crashing with the "problem size" error. The investigation revealed that while the user intended to use a , the software had defaulted to checking out the Academic Teaching license , which lacked the capacity for that model size.
If you exceed these numbers, the solve will fail, and the message will change from "verified" to a "limit exceeded" error. 3. How to Manage Model Size When contact definitions or remote points are used,
Contact your ANSYS reseller to request a license feature upgrade (e.g., HPC Pack, larger problem size caps, or unlimited nodes).
The Ansys solver checks the , not just the total sum of the nodes. When you configure Remote Points, MPC Contacts, or Springs , Ansys creates virtual elements and often increments the node IDs exponentially into higher number pools (e.g., jumping from ID 28,000 to ID 35,000). The solver reads "ID 35,000", assumes you exceeded the 32,000 limit, and fails. How to Verify Node IDs and Statistics Click on the Mesh branch in the Ansys Mechanical outline. Open the Details Window and expand the Statistics section. Note down the literal count of nodes and elements.
Here is a useful guide on how to interpret, troubleshoot, and resolve this error.
Sometimes the interface enforces a stricter check than the solver. Try launching the solver directly: such as Academic
Typically 128,000 nodes.
Proactive engineering is better than reactive debugging.
This message indicates that the model you are trying to solve exceeds the allowed number of nodes or elements stipulated by your license type, such as Academic, Student, or certain entry-level commercial packages.
