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.
Do not panic. You have several options, ranging from simple workarounds to strategic licensing changes.
License Feature: ansys
Maximum DOFs allowed by license: 128000
Current model DOFs: 112500 -> OK
If exceeded:
License Feature: ansys_prof
Maximum DOFs allowed by license: 32000
Current model DOFs: 45000 -> ERROR: License limit exceeded.
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:
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:
Verifying Problem Size Limits
To verify the numerical problem size limits for your ANSYS license, follow these steps:
Common Numerical Problem Size Limits
Here are some common numerical problem size limits associated with ANSYS licenses:
Implications of Exceeding Problem Size Limits
If you exceed the numerical problem size limits associated with your ANSYS license, you may encounter:
Mitigating Problem Size Limits
To mitigate the numerical problem size limits associated with your ANSYS license:
Best Practices for Managing Problem Size Limits
To effectively manage numerical problem size limits in ANSYS: Set an alert in Mechanical when nodes exceed
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
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.
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.
Title: "Unlocking Engineering Potential: Verifying Numerical Problem Size Limits with ANSYS"
Introduction
In the world of engineering and simulation, accuracy and reliability are paramount. ANSYS, a leading provider of engineering simulation software, offers a wide range of tools to help engineers and researchers analyze and optimize their designs. One crucial aspect of working with ANSYS is understanding the limitations of your product license, particularly when it comes to numerical problem size limits. In this blog post, we'll delve into the importance of verifying these limits and how to do it effectively.
What are Numerical Problem Size Limits?
Numerical problem size limits refer to the maximum number of elements, nodes, or degrees of freedom that your ANSYS license can handle. These limits vary depending on the specific ANSYS product and license type you have. Exceeding these limits can lead to inaccurate results, incomplete simulations, or even software crashes.
Why Verify Numerical Problem Size Limits?
Verifying numerical problem size limits is essential for several reasons:
How to Verify Numerical Problem Size Limits with ANSYS
To verify your ANSYS license's numerical problem size limits, follow these steps:
Tips and Best Practices
To make the most of your ANSYS license and ensure accurate results:
Conclusion
Verifying numerical problem size limits with ANSYS is crucial for ensuring accurate and reliable simulation results. By understanding your license limits and following best practices, you can unlock the full potential of your ANSYS product, optimize resource usage, and drive innovation in your engineering projects.
Additional Resources
Share Your Thoughts!
Have you encountered any challenges with ANSYS license limits? Share your experiences and tips in the comments below!
You’re in the zone. Your mesh is beautiful, your boundary conditions are set, and you hit “Solve.” Then, the solver stops. The message reads:
“Your product license has numerical problem size limits verified.”
If you’ve seen this, you’re not alone. It’s one of the most common—and confusing—license errors in Ansys. Let’s break down what it means, why it happens, and how to fix it.
Add a small Python script in Workbench that queries:
import ansys.licensing as licensing
lic = licensing.License()
print(f"Max nodes allowed: lic.get_feature('mechanical').max_nodes")
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.
The message " Your product license has numerical problem size limits verified
" appears in Ansys when the software confirms that you are using a version—typically the Ansys Student
edition—that restricts the complexity of simulations you can run. This is not a "bug" but a built-in constraint of the license tier. Core Limits by Physics These limits represent the maximum allowable total count of nodes and elements (or cells) in your mesh: Structural (Mechanical): Typically limited to 32,000 nodes and elements Fluid Dynamics (CFD/Fluent): Typically limited to 512,000 cells/nodes . Some newer versions may allow up to 1 million cells. Electronics Desktop: Restricted to 64,000 3D volume elements HPC (Parallel Processing): Student versions are often capped at 4 to 16 cores Immediate Fixes & Workarounds
If you encounter this error while trying to solve, you must reduce the model's complexity to fit within the license window: Ansys Student - Engineering Information Technology
Understanding the "Ansys Product License Numerical Problem Size Limits Verified" Message
If you are seeing the message "Ansys Your product license has numerical problem size limits verified" in your output file or solver console, you have encountered the built-in "governor" of an Ansys academic or entry-level license. Verifying Numerical Problem Size Limits for ANSYS: A
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?
Ansys offers various licensing tiers ranging from free student versions to high-end enterprise packages. To keep the student versions accessible, Ansys limits the complexity of the models you can solve.
When you initiate a solve, the software performs a Verification Check. It counts the number of nodes and elements (for FEA) or cells (for CFD). If the count is within the allowed range, it prints this message as a "pass" notification and begins the calculation. 2. Common License Limits
The limits depend heavily on which version of Ansys you are running. As of the most recent releases, the standard limits for Ansys Academic Student versions are: Structural (Ansys Mechanical): 128,000 nodes/elements. Fluid (Ansys Fluent / CFX): 512,000 cells/nodes.
Electromagnetics: Restrictions usually apply to the number of primitives or mesh complexity.
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
If you find yourself hitting these limits frequently, or if the "verified" message is a reminder that you are close to the ceiling, consider these optimization strategies: Use Symmetry
If your part is symmetric, don't model the whole thing. Using Symmetry Regions allows you to model half, a quarter, or an eighth of the geometry, effectively doubling or quadrupling your allowable mesh density. Simplify Geometry
Remove small fillets, rounds, or decorative features that don't impact the global physics. These features often "hog" elements by forcing the mesher to create tiny cells in insignificant areas. Use Shell and Beam Elements
Solid (3D) elements consume the node budget very quickly. Whenever possible, represent thin-walled structures with Shell elements and long, slender components with Beam elements. This can reduce your node count by 80–90% without sacrificing accuracy. Localized Inflation and Sizing
Instead of a fine global mesh, use a coarse global mesh and apply Local Sizing 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
If your research or professional project requires a higher fidelity than the "verified" limits allow, you have three primary paths:
Academic Research License: If you are at a university, check if your lab has a "Research" license. These have much higher limits (often in the millions) or are completely "Unlimited."
Ansys Learning Forum: If you believe your mesh is small but the error persists, the Ansys Learning Forum is the best place to post your project files for a license check.
Commercial Licensing: For professional work, moving to a Pro, Premium, or Enterprise license removes these numerical bottlenecks entirely.
Seeing the "numerical problem size limits verified" text means your license is working exactly as intended. It is a signal that your current model fits within the bounds of your specific software tier, allowing you to proceed with your simulation.
This error message typically appears in Ansys products (like Fluent, CFD, or Mechanical) when the license manager detects that the problem you are trying to solve requires more resources (cells, nodes, or equations) than your specific license type permits.
Here is a useful guide on how to interpret, troubleshoot, and resolve this error. In a static analysis
In a static analysis, you might be under the limit. However, a nonlinear transient analysis with 50 time steps and 10 substeps per step multiplies the effective problem size. ANSYS counts the peak numerical problem size, not the average.