| T2111 | FATAL ERROR: T2111 | COMPONENT SYMBOL MUST BE UNIQUE |
| Cause: | A SURFACE Case Control command was defined with the same component symbol defining the SURFACE x-axis and normal. | |
| Action: | Correct the component symbol(s) using the required format. | |
| Remarks: | See Autodesk Nastran Reference Guide, Section 3, Case Control, for command format. |