This notification is more than just an annoyance—it is a hard stop. It indicates that the scale of the simulation you are attempting to run exceeds the allowances of the specific Ansys license token you have checked out.
Understanding, Troubleshooting, and Overcoming Mesh & DOF Constraints in Ansys Simulations This notification is more than just an annoyance—it
Have you encountered this warning with a specific license type? Leave a comment below or contact your Ansys support channel for size limit exceptions. Leave a comment below or contact your Ansys
fluent 3ddp -g -t4 -i journal.jou Or for Mechanical: The license check occurs at solver start—using a
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). In CFX, you can run the solver separately from the pre-processor. The license check occurs at solver start—using a different feature set may allow larger sizes. 6. Purchase or Rent a “Problem Size Unlocked” Token Contact your Ansys reseller to add a “Max Problem Size Unlimited” add-on or upgrade your license from Professional to Enterprise. For temporary needs, consider elastic licensing (ELU) to rent high-tier tokens for 24 hours. 7. Optimize Using HPC Packs (For MPI Solves) If you have many cores but a capped license, distributing across nodes might trigger the limit earlier. Run serial (1 core) first to see if it’s a true node limit or a parallel licensing issue. Sometimes reducing cores to 2 avoids an HPC pack requirement that inadvertently enforces problem size checks. Part 6: Preventing the Error in Future Projects Proactive engineering is better than reactive debugging. Best Practice 1: Run a “License Check” Pre-Solve Script Add a small Python script in Workbench that queries: