Ansys Your Product License Has Numerical Problem Size Limits Verified May 2026

Solving the "Numerical Problem Size Limits" Error in Ansys Getting the error message

"Your product license has numerical problem size limits, you have exceeded these..."

is a common hurdle, especially for students and researchers using academic or introductory versions of Ansys.

This error typically triggers when your mesh (nodes and elements) exceeds the hard caps defined by your specific license type. Below is a breakdown of why this happens and how to fix it without losing simulation quality. Understanding the Limits

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.

Why You Exceeded the Limit (Even When the Mesh Looked Small)

Sometimes your mesh count looks fine, but you still hit the limit. Here’s why: Hidden Elements:

Remote boundary conditions, moments, and contacts often generate additional "hidden" connection elements at the start of a solve, pushing you over the limit. Node ID Inflation: In some cases, the limit isn't just the of nodes, but the highest

. If your node numbers are sparse (e.g., jumps from 10 to 5,000), the solver might think the problem is larger than it is. The "Latch" Bug:

If you once ran a simulation that was too big, Ansys sometimes "remembers" the error. Even after reducing the mesh, the setup cell may need a reset. 5 Pro-Tips to Fix the Error 1. Compress and Renumber Your Mesh If your problem is sparse Node IDs, you can "compact" them. Right-click on Mesh Numbering Compress Node Numbers Right-click Mesh Numbering and select Renumber Mesh 2. Simplify Geometry (Shells and Beams)

Solid models eat up nodes quickly. Consider converting 3D solid bodies into midsurface shell models beam models Ansys SpaceClaim

. This drastically reduces the node count while maintaining accuracy for thin-walled or long, slender structures. 3. Use Symmetry

Step 1: Verify Your Current License Using ans_licinfo

Do not guess. Run the ANSYS License Management Center utility (ans_licinfo or lmstat). Identify exactly which product feature is checked out (e.g., ansys , mech, fluent). Look for keywords like _teaching, _research, _pro, or _entry. Knowing the exact license feature explains the limit.

Final Thoughts

The “numerical problem size limits verified” error isn’t a bug—it’s a license checkpoint. Understanding it saves hours of debugging.

Next time you see it: Check your mesh size → Compare to your license tier → Coarsen, symmetrize, or upgrade.

Have you encountered a weird DOF limit that didn’t make sense? Share your experience in the comments below—chances are, someone else has solved it.

Need help reading your Ansys license file? Drop us a line or check our license optimization guide.

When you encounter the error "Your product license has numerical problem size limits," it typically means your current model's mesh count

(nodes or elements) exceeds the hard caps set by your specific Ansys license , most commonly the free Ansys Student Ansys Innovation Space 1. Identify Your Current Limits

License limits vary significantly depending on the solver and product version you are using. Your product license has numerical problem size limits…..

The error message "your product license has numerical problem size limits" is a hard cap enforced by Ansys on its academic and free student software packages. This limit restricts the complexity of simulations by capping the number of nodes and elements allowed in a single model. Core License Limits

The specific limits vary depending on the physics environment and the type of academic license being used. Physics Type Ansys Free Student Limit Higher Academic Tiers (e.g., Research) Structural (Mechanical) 32,000 nodes/elements Up to 512,000 nodes Fluids (CFD/Fluent) 512,000 nodes/cells No limit (on full licenses) Electromagnetics Specific limits vary by version Scaled based on license tier Common "Hidden" Triggers

Even if your visible mesh count is below the limit, the solver may still block you due to: Your product license has numerical problem size limits…..

This error message typically indicates that you are using an Ansys Student

license, which has hard-coded limits on the number of nodes or elements your model can contain

. When your mesh exceeds these values, the solver is blocked from proceeding. Standard License Limits

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

Older versions were capped at 32k; newer releases (2021 R2+) allow up to 128k. Fluid (CFD/Fluent) 512,000 – 1,048,576

Limits vary by release; many current student versions allow ~512k cells. Electronics (HFSS/Maxwell) 64k (3D), 8k (Surface) Solving the "Numerical Problem Size Limits" Error in

3D volume limit is 64,000 elements; 2D limit is 2,000 triangles. Rocky (DEM) 32,000 particles Particle count limit is 32k regardless of shape. Common "Hidden" Causes

Sometimes the error appears even if your node count seems below the limit. This is often due to: How to solve the mesh size limit in ANSYS student license?

Understanding the "Your Product License Has Numerical Problem Size Limits" Error in ANSYS

If you are working on a complex simulation and suddenly see the message "Your product license has numerical problem size limits," you’ve hit a structural wall in your workflow. This error isn’t a bug; it is a built-in restriction based on the specific license tier you are using. 1. Why Does This Error Occur?

ANSYS scales its software capabilities based on the license type. This error typically triggers when your model's mesh density (the number of nodes and elements) exceeds the maximum allowed by your current seat. It is most common in two scenarios:

The Student/Academic Version: Designed for learning, these free versions have hard caps on model complexity.

Lower-Tier Commercial Licenses: Some entry-level commercial packages limit the "Problem Size" to keep costs lower for small-scale engineering tasks. 2. Verified Problem Size Limits

While limits can change with software updates (e.g., from version 2023 R1 to 2024 R2), the standard limits for the ANSYS Student Edition generally remain consistent: Structural Physics (Mechanical): 128k nodes/elements. Fluid Physics (Fluent/CFX): 512k cells/nodes.

Electromagnetics: Limits often apply to the number of objects or the mesh density depending on the specific solver (HFSS vs. Maxwell).

If you are using a Commercial license (like ANSYS Pro or Premium) and see this, you may be attempting a high-fidelity simulation that requires an ANSYS Enterprise license or additional HPC (High-Performance Computing) packs. 3. How to Verify Your Current Limits

To confirm exactly what your license allows, follow these steps:

Check the License Manager: Open the ANSYS License Management Center. Under the "View Status" or "License File" tabs, you can see the specific features (increments) enabled.

In ANSYS Mechanical: Look at the "Statistics" tab under the Mesh branch in the project tree. This shows your current Node and Element count. If this number exceeds 128,000 on a Student version, the solver will refuse to run.

Check the Output File: When the solver fails, open the .out or .log file. It will explicitly state: "The number of nodes [X] exceeds the maximum limit of [Y]." 4. How to Fix the Error

If you cannot upgrade your license immediately, you must optimize your model to fit within the "Problem Size" constraints:

Symmetry: Use 1/2 or 1/4 symmetry (Symmetry Regions) to reduce the model size by half or more while maintaining the same mesh density.

Mesh Refinement: Instead of a global fine mesh, use Local Mesh Sizing. Keep the mesh coarse in non-critical areas and fine only where stresses or gradients are high.

Simplify Geometry: Remove small fillets, holes, or decorative features that force the mesher to create unnecessary elements.

Element Types: In structural shells, switching from higher-order (quadratic) elements to lower-order (linear) elements significantly reduces node count, though it may impact accuracy. 5. Moving Beyond the Limits

If your project requires high fidelity that exceeds these limits, your options are:

Academic Researchers: Ensure you are using the Research license provided by your university, not the Student download.

Commercial Users: Contact your ANSYS channel partner to discuss an upgrade to a higher tier or to add HPC Packs which unlock larger solve capabilities.

Are you currently working on a structural or fluids project, and do you know your current node count?

The error message "Your product license has numerical problem size limits verified" typically appears when a simulation model exceeds the hard constraints of a non-commercial Ansys license. This most commonly affects users of Ansys Student or Academic versions, where the software restricts the complexity of models to ensure the free version is used for educational purposes rather than professional-grade production. Core Limits by License Type

License limits are primarily based on Node and Element (or cell) counts. Once your mesh statistics cross these thresholds, the solver will refuse to proceed.

Troubleshooting: "Your Product License Has Numerical Problem Size Limits Verified"

When you encounter the error message "Your product license has numerical problem size limits, you have exceeded these problem size limits and the solver cannot proceed," it means your current Ansys license (typically the free Student Version or a specific University License) has a cap on the number of nodes or elements your model can contain.

The solver "verifies" this size before it begins calculating. If the count exceeds the predefined threshold, the simulation is blocked to ensure compliance with the license agreement. Standard License Limits Step 1: Verify Your Current License Using ans_licinfo

Limits vary by physics and version, but general caps for the Ansys Student version are: Structural Physics: 128,000 nodes/elements. Fluid Physics (Fluent): 512,000 cells/nodes. Ansys Motion: 100,000 nodes per flexible body. Step-by-Step Resolution Guide

Follow these steps to diagnose and bypass the numerical limit error. 1. Check Your Current Mesh Statistics

Before making changes, confirm how far you are over the limit. In the Outline tree, select the Mesh branch. In the Details window, expand the Statistics section. Check the total number of Nodes and Elements.

Note: Hidden elements like Contact Elements, SURF elements for loads, or Weak Springs also count toward the total, even if they aren't visible in the mesh statistics. 2. Compress and Renumber Node IDs

Sometimes the total node count is fine, but a specific Node ID exceeds the limit (e.g., a node labeled #33,000 when the limit is 32,000). Right-click on Model and select Insert > Mesh Numbering. Set Compress Node Numbers to Yes. Right-click on Mesh Numbering and select Renumber Mesh. 3. Use Symmetry to Reduce Model Size

If your geometry and loading are symmetric, you can simulate a fraction of the model to stay under the limit.

Split the geometry in SpaceClaim or Discovery (e.g., into a half or quarter model).

Apply Symmetry Boundary Conditions to the cut faces. This effectively doubles or quadruples your allowable mesh density for the same node count. 4. Simplify Geometry and Mesh Controls

Reduce the complexity of the model to lower the cell count naturally.

Midsurface Extraction: Convert thin solids into Shell Elements using the "Midsurface" tool in SpaceClaim. Shells use significantly fewer nodes than 3D solid elements.

Global Sizing: Increase the Element Size in Mesh details to coarsen the mesh.

Local Refinement: Use Mesh Sizing controls to keep a fine mesh only in critical areas (like stress concentrations) and a coarse mesh elsewhere.

Linear Elements: Change the Element Order from Quadratic to Linear. This reduces the number of mid-side nodes, drastically lowering the total node count. 5. Reset the Solver Cell (If Limit was Previously Exceeded)

Whether you're a student pushing the boundaries of a free license or a researcher managing university seats, the error

"Your product license has numerical problem size limits verified" is a classic roadblock in

. It essentially means your model’s complexity has outgrown your license's predefined capacity.

Here is a blog post guide to understanding, diagnosing, and fixing this limitation.

Decoding the Error: "Your Product License Has Numerical Problem Size Limits"

If you’ve just hit "Solve" only to be greeted by a license limit error, don't worry—you haven't broken the software. This message is Ansys’s way of saying your mesh is too "expensive" for the license key you are currently using. 1. Why Am I Seeing This? Most often, this happens because you are using an Ansys Student

license. These versions are designed for learning and small-scale projects, so they come with hard caps on how many "pieces" (nodes and elements) your simulation can have. Standard Limits for Ansys Student (v2023/2024): Structural (Mechanical):

128,000 nodes/elements. (Note: Older versions were limited to 32k). Fluid Dynamics (Fluent):

512,000 cells/nodes. (Newer versions may allow up to 1 million). 2. The Hidden "Trap": Why Your Small Model Failed

Sometimes you check your mesh and see 30,000 nodes—well under the 128,000 limit—yet it fails. Why? Contact Elements:

In Mechanical, the solver creates "contact elements" at runtime to handle interactions between parts. These are invisible in your initial mesh count but toward the license limit. The "Ghost" Limit:

If you once exceeded the limit and then reduced your mesh, Ansys sometimes "remembers" the failure. A common workaround is to Update Geometry from Source

or duplicate the Model cell to a new Setup cell to reset the license check. Node ID Limits: In some cases, the error isn't the

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)

Before reaching for your wallet, try these optimization techniques to shrink your problem size: Symmetry is Your Friend: Need help reading your Ansys license file

If your part is symmetrical, simulate only half (or a quarter) of it. This can instantly cut your node count by 50–75%. Use Shells and Beams:

Don't use 3D "Solid" elements for thin sheets or long wires. Converting a thin plate to a

model can reduce node counts from thousands to hundreds with better accuracy. Local Refinement:

Instead of a fine mesh everywhere, use a coarse global mesh and apply a Sphere of Influence Local Sizing only where the stress is highest. Linear vs. Quadratic:

Quadratic elements (higher order) are more accurate but use more "space." If you are just testing a concept, switching to Linear elements can help you stay under the cap.

Verifying Numerical Problem Size Limits for ANSYS: A Comprehensive Guide

As a leading provider of engineering simulation software, ANSYS has established itself as a gold standard in the industry. With a wide range of tools and features, ANSYS enables engineers and researchers to simulate and analyze complex systems, from simple mechanical components to intricate multiphysics phenomena. However, as with any software, ANSYS is not immune to limitations, particularly when it comes to problem size.

In this article, we will explore the numerical problem size limits associated with ANSYS, discuss their implications, and provide guidance on verifying and mitigating these limitations.

Understanding ANSYS Licensing and Problem Size Limits

ANSYS offers various licensing options to cater to different user needs, including:

  1. Perpetual licenses: A one-time purchase license that grants access to ANSYS software for a specific version.
  2. Subscription-based licenses: A recurring license that provides access to ANSYS software for a specified period.
  3. Pay-per-use licenses: A flexible licensing option that allows users to pay for the software usage based on the number of simulations run.

While these licensing options provide flexibility, they also come with numerical problem size limits. These limits are designed to prevent excessive usage and ensure fair access to the software. The limits are typically defined by the number of:

  • Elements: The number of discrete elements used to discretize a model.
  • Nodes: The number of points in a model where the solution is calculated.
  • DOFs (Degrees of Freedom): The number of independent variables in a model.

Verifying Problem Size Limits

To verify the numerical problem size limits for your ANSYS license, follow these steps:

  1. Check your license agreement: Review your license agreement or contract to understand the specific problem size limits associated with your license.
  2. Access the ANSYS License Manager: Launch the ANSYS License Manager, which can be found in the ANSYS installation directory.
  3. Run the lmstat command: Run the lmstat command in the License Manager to display information about your license, including the problem size limits.
  4. Check the ANSYS documentation: Consult the ANSYS documentation, specifically the "ANSYS Licensing" section, for information on problem size limits.

Common Numerical Problem Size Limits

Here are some common numerical problem size limits associated with ANSYS licenses:

  • Element limit: 100,000 to 1 million elements, depending on the ANSYS product and license level.
  • Node limit: 50,000 to 500,000 nodes, depending on the ANSYS product and license level.
  • DOF limit: 100,000 to 1 million DOFs, depending on the ANSYS product and license level.

Implications of Exceeding Problem Size Limits

If you exceed the numerical problem size limits associated with your ANSYS license, you may encounter:

  • License errors: ANSYS may display license errors or warnings, indicating that the problem size limits have been exceeded.
  • Simulation termination: ANSYS may terminate the simulation or refuse to run, citing license limitations.
  • Inaccurate results: Exceeding problem size limits can lead to inaccurate results or reduced solution accuracy.

Mitigating Problem Size Limits

To mitigate the numerical problem size limits associated with your ANSYS license:

  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 Practices for Managing Problem Size Limits

To effectively manage numerical problem size limits in ANSYS:

  1. Monitor your license usage: Regularly check your license usage and problem size limits.
  2. Plan your simulations: Plan your simulations in advance, taking into account problem size limits.
  3. Optimize your workflow: Optimize your workflow to minimize the number of simulations required.
  4. Consult ANSYS support: Contact ANSYS support for guidance on managing problem size limits.

Conclusion

Numerical problem size limits are an essential consideration when working with ANSYS software. Understanding these limits and their implications can help you optimize your simulations, ensure accurate results, and make the most of your ANSYS license. By verifying your license's problem size limits, following best practices, and exploring mitigation strategies, you can efficiently and effectively utilize ANSYS software for your engineering simulation needs.

References

  • ANSYS Licensing Guide
  • ANSYS Documentation: ANSYS Licensing
  • ANSYS Support: License FAQs

By following the guidelines and best practices outlined in this article, you can ensure that you are using ANSYS software efficiently and effectively, while also maximizing the value of your investment.

Here’s a clear, informative content piece explaining how ANSYS enforces numerical problem size limits based on your product license. You can use this for internal documentation, a knowledge base article, or a team notification.

Decoding the Warning: “ANSYS Your Product License Has Numerical Problem Size Limits Verified”

For engineers, simulation analysts, and design professionals, ANSYS is the gold standard for finite element analysis (FEA), computational fluid dynamics (CFD), and electromagnetics. Few things disrupt a deep workflow like an unexpected error message. One of the most confusing yet critical warnings appears during meshing, solving, or post-processing:

“ANSYS Your product license has numerical problem size limits verified.”

If you have seen this message, your simulation has stopped dead in its tracks. You are likely frustrated, confused, and worried about your project deadline. This article will dissect every component of that warning—what it means, why it happens, and exactly how to resolve it—so you can move from a licensing bottleneck back to high-fidelity simulation.

Method 4: Check Pre-Solver Warnings

When starting a solve, ANSYS will output:

*** WARNING ***
Your current license (ANSYS Professional) limits DOFs to 32,000.
Current model has 45,200 DOFs. Solution will not proceed.

Common Scenarios Where This Happens

  • Student license – A 50,000-element mesh on a simple bracket might already exceed the limit.
  • CFD Research license – Trying to run a 1.2M cell simulation when your license caps at 512k cells.
  • Old license file – After upgrading hardware or meshing methods, your model’s DOFs increased naturally.