| T2286 | WARNING: T2286 | UNABLE TO GENERATE NON-ZERO ORTHOTROPIC MATERIAL ALLOWABLE |
| Cause: | The matrix and/or fiber material referenced on the specified MATL8 Bulk Data entry is missing data required to generate equivalent orthotropic material allowables using the Halpin-Tsai method. | |
| Action: | Check that the orthotropic materials referenced have Xt, Xc, Yt, Yc, and S specified, and that the isotropic materials have ST, SC, and SS. | |
| Remarks: | See Autodesk Nastran Reference Guide, Section 4, Bulk Data, for entry format. |