Select the equation solver to be used in the Warp analysis.
If this option is set to Automatic, the analysis will automatically use a matrix solver appropriate to the size of the model, and for Midplane models, compatible with the selected Warp analysis type option. For small models, the Direct option is used. For large models, using an iterative matrix solver can improve the performance of the solver by reducing analysis time and memory requirement. The AMG option is preferred unless memory requirement becomes the limiting factor. You can override the automatic selection.
The Direct solver is a simple matrix solver which is efficient for small to medium sized models. For large models, the direct solver becomes less efficient and requires a large amount of memory (disk swap space).
The AMG (Algebraic Multi-Grid) iterative solver is very efficient for large models. Choosing this option can significantly reduce analysis time but requires a larger amount of memory than the SSORCG option. For Midplane models, the AMG solver does not support Warp analysis type set to Automatic or Buckling.
The SSORCG (Symmetric Successive Over-Relaxation Conjugate Gradient) iterative solver (previously known as Iterative Solver) is less efficient than the AMG option for large models but requires less memory. For Midplane models, the SSORCG solver does not support Warp analysis type set to Automatic or Buckling.