| E5059 | FATAL ERROR: E5059 | NON-ZERO DIFFERENTIAL STIFFNESS MATRIX REQUIRED FOR ANALYSIS |
| Cause: | In BUCKLING solutions, a non-zero global differential stiffness matrix is required to extract eigenvalues (buckling load factors) and eigenvectors (mode shapes). This is usually the result of a zero load vector in the initial subcase. | |
| Action: | Correct the model loading. | |
| Remarks: | None. |