| E5008 | FATAL ERROR: E5008 | NON-ZERO STIFFNESS MATRIX REQUIRED FOR ANALYSIS |
| Cause: | All diagonal terms of the global stiffness matrix were zero. | |
| Action: | Check that all applicable material and element properties are real and positive. If you are using shell elements, make sure they have a non-zero thickness. | |
| Remarks: | None. |