Right before the "verified" warning appears, the solver console usually prints a line like:
“Maximum problem size for this license is 512000 nodes.”
If you consistently hit the limit, your engineering needs have outgrown your license type. Contact your ANSYS reseller or internal IT/license administrator. Ask for a quote to upgrade:
This specific error message is a rite of passage for almost every engineering student using the Ansys Student version. It occurs when your simulation mesh—the digital "grid" that breaks your model into tiny pieces for calculation—contains more nodes or elements than the free license allows.
Here is a short story of an engineering student facing this exact wall. The Midnight Mesh
Leo sat hunched over his laptop at 2:00 AM, the blue light reflecting off his glasses. He was finishing his final project: a stress analysis on a custom-designed car jack. He had spent hours in SpaceClaim refining the geometry until it was perfect—every bolt, every chamfer, and every small fillet was meticulously modeled. Right before the "verified" warning appears, the solver
He opened the Mechanical window and hit "Generate Mesh." The progress bar crawled across the screen. When it finished, the model looked beautiful, covered in a fine, dense web of silver lines. Leo felt a surge of pride. This wasn't just a simulation; it was art. He clicked Solve.
He waited. Instead of the satisfying green progress bar of a running solver, a sharp, red error message popped up:
"Your product license has numerical problem size limits, you have exceeded these problem size limits and the solver cannot proceed."
Leo’s heart sank. He checked his mesh statistics. He had 150,000 nodes. For his structural analysis, the Ansys Student limit was strictly 128,000 nodes/elements. He was "too good" for the free license.
Desperate, he tried to "renumber" the nodes or restart the software, hoping it was a glitch. No luck. The license manager had "verified" the size, and it was a hard wall. Ansys Student - Engineering Information Technology “Maximum problem size for this license is 512000 nodes
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…..
This message indicates that your Ansys Student or Academic license has restricted the number of nodes or elements you can solve. When your model exceeds these pre-defined limits, the solver is programmed to stop before the simulation begins. Standard License Limits
For most Ansys Student versions, the common numerical limits are: If you consistently hit the limit, your engineering
Structural Physics: 32,000 nodes and elements combined. Some newer versions may allow up to 128,000.
Fluid Physics (CFD): 512,000 cells and nodes combined. Recent updates may support up to 1,000,000 cells. Electromagnetics (Maxwell): 64,000 elements for 3D volume. Why the Error Appears (Even if Mesh Looks Small)
Even if your displayed mesh count is below the limit, the error can trigger due to: Your product license has numerical problem size limits…..
If you see this message, follow this hierarchy of solutions from simplest to most comprehensive.
Sometimes the interface enforces a stricter check than the solver. Try launching the solver directly:
fluent 3ddp -g -t4 -i journal.jou
Or for Mechanical:
ansysXX -dis -b -m 4 -i input.dat -o output.out
The batch flag (-b) sometimes bypasses immediate size verification (not a full bypass, but avoids GUI overhead).