| T2285 | FATAL ERROR: T2285 | UNABLE TO GENERATE NON-ZERO ORTHOTROPIC MATERIAL MODULUS |
| Cause: | The matrix and/or fiber material referenced on the specified MATL8 Bulk Data entry is missing data required to generate equivalent orthotropic material moduli using the Halpin-Tsai method. | |
| Action: | Check that the orthotropic materials referenced have E1, E2, NU12, and G12 specified and that the isotropic materials have E, G, and NU. | |
| Remarks: | See Autodesk Nastran Reference Guide, Section 4, Bulk Data, for entry format. |