| S1100 | FATAL ERROR: S1100 | NO MODEL INPUT FILE OR DATABASE SPECIFIED |
| Cause: | Input model was not defined. | |
| Action: | Specify either a Model Input filename or a Database filename on the Autodesk Nastran command line. | |
| Remarks: | See Autodesk Nastran Reference Guide, Section 1, NASTRAN Command Line, and Section 2, Initialization, for more information. |