Saving and Opening Recovery Files

The COMSOL Multiphysics software can store recovery files each time you start a solver. This setting is initially active by default.

To open a recovery file, select . For Windows users, you can also customize the Quick Access Toolbar and then click the (

) button. See Windows Toolbars and Menus.

The update of the recovery file occurs at the following events:

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After completing the solution for each time step specified as the output times in the field for a time-dependent simulation.

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After completing each parameter step in a parametric simulation.

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After completing each successful Newton iteration for a nonlinear stationary simulation.

The recovery files are COMSOL Multiphysics MPH-files that represent the state at the time that they were saved. They make it possible to recover from a solver error, which can be especially useful for long time-dependent or parametric runs.

The dialog box lists all recovery files found in chronological order. The files are listed with the date and time when they were saved. When a recovery file is selected, click to open it in the COMSOL Desktop. Click the button to display or hide more details about the recovery files. The detailed view includes the full file path and the file size for the recovery files. Click to remove the selected recovery files. Click the button to delete all recovery files.

The COMSOL software keeps track of the computed time steps or parameter steps in the recovery file, so right-click the node and select (

) to continue the computation from the point where it was stored in the recovery file. If you are solving a stationary nonparametric problem, the last converged Newton iteration is stored in the recovery file; selecting causes the software to resume solving from this stored state.

You can make changes to these default settings in The Preferences Dialog Box in the section.

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The check box is selected by default to save recovery files to disk during the solution process for time-dependent, parametric, and nonlinear solvers.

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In the field, you can specify a different folder from the default to, for example, use a folder on the server where there is more disk space for storing large recovery files. Click to browse to a recovery file folder.

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In the field you can specify a different folder than the default to, for example, use a folder where there is more disk space for storing large temporary files. Click to browse to a folder for temporary files.

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If you run the COMSOL software in a client-server configuration, you can specify a , and .


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