Not all ANSYS licenses are equal. The company deliberately scales feature access and computational capacity to match different user needs and price points. The "numerical problem size limits" exist for three primary reasons:
If you are on a network with multiple license types (e.g., both Teaching and Research tokens available), ANSYS may default to the lower-tier license. Force a higher-tier license: Not all ANSYS licenses are equal
"<Installation_Path>\commonfiles\license\tools\winx64\licerror" > license_debug.txt both Teaching and Research tokens available)
Sometimes the error appears even if your node count seems below the limit. This is often due to: How to solve the mesh size limit in ANSYS student license? Not all ANSYS licenses are equal