Fix Memory Allocation Errors in Ansys CFX | Solver Crash Troubleshooting

Solver stopping with “Memory allocation error” messages? Occasionally, Ansys CFX simulations stop prematurely and show output errors such as "INSUFFICIENT CATALOGUE SIZE" or "INSUFFICIENT MEMORY ALLOCATED". This tutorial walks you through a systematic workflow for diagnosing and fixing memory-related crashes in Ansys CFX: Read the out file to pinpoint where the allocation failed (partitioning, linear solver, I/O, etc.) Size the problem: element count vs. available RAM & swap, parallel vs. serial runs Adjust Memory Allocation Factor, stack limits, and partition settings for efficient usage Reduce mesh load with adaptive sizing or region-based refinement Validate the fix by monitoring peak memory in the next run This tutorial was uploaded in 2017, so the interface style has evolved, but every troubleshooting step still works in current releases. Need expert help solving persistent CFX errors? Visit our website: https://simutechgroup.com Subscribe to this channel: ‪‪‪‪‪@SimuTechGroup‬ Chapters 00:00 – Introduction to CFX Memory Error 00:30 – Understanding the Error Message 01:15 – Identifying the Source: Solver, Partitioner, or Interpolator 02:00 – Adjusting Memory Settings in Define Run Panel 03:15 – Using Multipliers and Manual Memory Allocation 04:30 – Final Tips and Support Resources