. This typically happens when an operation requires a higher-tier license or a specific feature (like high-performance computing or advanced meshing) that is not currently available in your pool. CFD Online Common Causes Feature Limitations:
To understand the fix, you must understand the license structure. ANSYS uses a licensing system. Your license file (usually license.dat or ansyslmd.lic ) contains specific feature lines (e.g., feature=AA_T_A for structural analysis, feature=HFSS for high-frequency simulation).
The software may be trying to pull a license for a product you don't own because of the order set in your Ansys License Preferences Recommended Solutions How to check license status and availability - Ansys Optics
lmstat -a -c 1055@yourserver
Even if the license server has the feature, ANSYS may look for the wrong license type.
Before fixing, identify your scenario:
Check if your license has expired or if you are using a version newer than your maintenance agreement allows. Open the Ansys License Management Center on the server.
Ensure the box is checked.
EXCLUDE feature_name user_or_host RESERVE feature_name user
Many universities use ANSYS Teaching Licenses (e.g., "AA_T_A_Teaching"). These allow pre-processing and solving on limited mesh sizes (e.g., 512K nodes). If you attempt HPC (High-Performance Computing) or run a simulation requiring 2M nodes, the license configuration rejects the operation.
The error typically means your Ansys application is trying to use a feature that isn't included in your current license or hasn't been prioritized correctly in your settings . 1. Adjust License Preferences (Most Common Fix)