Store and Reuse Solution Files

For large models, the simulation time can be decreased if the solution coefficients are saved during the solution phase.

Note: For smaller models (where the run time is short), storage of the solution coefficients is typically not required. Storage of solution coefficients creates large files.
On the Solve/Run tab, in the Solution settings group, click the  Solver settings icon.
Save/read matrix elements
This option allows you to save or read from a .mat file. The .mat are used to store the matrix elements of a linear equation system.
Save/read LU decomposed matrix
This option allows you to save or read the .lud file. The .lud files are used to store the elements of the LU-decomposed MoM matrix.
Save/read currents
This option allows you to save or read the .str files. The .str files are used by default to allow fast simulations in cases where the requests are modified without changing the rest of the model.
Save/read cable per-unit-length parameters
This option allows you to read or write a .pul file. The .pul files are used by default to allow the saving of cable per-unit-length parameters between frequency runs to allow fast simulation of cable harnesses.
Store convergence data (*.cgm file) for iterative solvers
This option allows the residue of the iterative solutions to be written to a .cgm file. Use this option when it is required to know how well a result has converged.
Note:

The saving of .mat, .lud, .cgm files and .pul for parallel runs is only possible if the model directory is on a shared location accessible by all processes.