By default, Workbench does not retain design points after they are solved or if they fail.
To keep the calculated data and/or files for design points that fail:
In the Project Schematic, double-click the Parameter Set bar.
To save the failed design point files, in the Properties view, select the Keep Failed Design Points Files (Beta) check box.
To save the failed design point calculated data, in the Properties view, select the Retain Failed Design Points (Beta) check box.