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.

Understanding and Resolving "Your Product License Has Numerical Problem Size Limits" in ANSYS

When you initiate a solve, the software performs a . 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

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

Which are you currently running? (e.g., Student, Research, Commercial)

When you configure bonded contacts, remote displacements, or remote moments, Ansys automatically injects underlying and surface effect elements during runtime. These elements do not appear in your initial mesh statistics but are pushed to the solver, instantly tipping your total node count over the license limit. The Node ID Gap (Renumbering Issue)

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

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

If your CAD model is symmetric, do not simulate the entire structure.

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