Error MessageMaximum available memory may have been exceeded

Issue:

The analysis stops, and the following error is issued:

Error: Maximum available memory may have been exceeded

The analysis was not able to complete successfully because it could not access enough memory to complete the calculation.

Solution:

Solution

There are several items to check to resolve this issue:

Number of Iterations:

If the specified number of iterations is greater than 1,000, specify a smaller number of iterations. When an analysis is started, Autodesk® Simulation CFD multiples the number of iterations by the memory per convergence set to allocate the storage space for all the expected convergence data.  

Mesh and Geometry:

  • Change the mesh distribution to be coarser.
  • A similar tactic is to go to Edge tab of the Mesh Diagnostics task dialog. Increase the Minimum Refinement length to reduce the mesh resolution on small features.
  • Be careful not to coarsen the mesh so much (or make the Minimum Refinement length so large) that the mesh fails to generate. This may require a few attempts before a successful mesh is generated.
  • If necessary, simplify the geometry so that a coarser mesh can be applied.

System Resources:

  • If the model still will not run after reducing the surface mesh density, adding more RAM to the computer can help resolve the issue.
  • Note that 32 bit machines are limited to 2Gbyte (3 Gbyte with the "3 Gigabyte switch")
  • x64 machines are not subject to such a memory limitation

Products:

Simulation CFD

Versions:

2010;2011;2012;2013;2014

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