Activate the command: 
Application Menu 
Options Mesh/FEM File Interface tab, or 
Tools Options Application Options Mesh/FEM File Interface tab.
The Loaded mesh file translation and FEM conversion plugins section of the Mesh/FEM File Interface tab will display all the loaded mesh and FEM file components. If you select one of the components and press the About button, the version information will be displayed.
When the NASTRAN files plugin is selected, the Options button will become available. Clicking the Options button let's you set the default values used when exporting a NASTRAN file. These options produce a GEOMCHECK card in the NASTRAN deck and are as follows:
- Perform geometry check: When activated, a GEOMCHECK card will be created.
- Message type: Choose the severity of the feedback message that is created when any geometry problems found.
- Message limit: Limit the number of warnings that are given.
- Produce summary table of geometry checks: Produce a summary table; no individual element information messages are output.
Tip: The above options can also be accessed while opening a model using OpenOptions.
OpenOptions.