Ansys Your Product License Has Numerical Problem Size Limits Verified -

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.

Test with a Known Small Model:

Run a 1000-node model. If that passes, your license works. The problem is purely model size. If even a small model fails, the license itself is corrupted or the feature is missing.

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. Here’s a clear, informative content piece explaining how

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.

Best Practice 1: Run a “License Check” Pre-Solve Script

Add a small Python script in Workbench that queries: Test with a Known Small Model: Run a 1000-node model

import ansys.licensing as licensing
lic = licensing.License()
print(f"Max nodes allowed: lic.get_feature('mechanical').max_nodes")

Scenario A: Meshing – The Silent Threshold

You generate a mesh. The process finishes without errors. But when you attempt to solve, ANSYS runs a pre-check, reads the license token, and aborts. The mesher may not check limits until the solver initializes.

How to Verify Your License’s Problem Size Limits

3. Update the License File

If you recently renewed your license or installed a new version of Ansys, the error might be due to an outdated license file (license.lic or ansyslmd.lic). Step 1: Verify Your Current License Using ans_licinfo

The "numerical problem size limits" are hard-coded definitions inside the license file.
Solution: Contact your license administrator or Ansys channel partner to get the updated license file and install it via the Ansys License Management Center.

Quick Fixes (Without Buying a New License)

If you need to solve now, try these:

Coarsen the mesh – Use larger element sizes. Cut DOFs by 50–80% with minimal accuracy loss for initial studies.
Use symmetry – Model 1/2, 1/4, or 1/8 of the geometry.
Switch solver technology – Some solvers (e.g., iterative vs. direct) report DOFs differently. Unlikely to bypass the limit, but worth checking.
Check for rigid bodies / remote points – These add constraint equations that count toward the limit.