| G3037 | FATAL ERROR: G3037 | NON-SINGULAR RIGID MASS MATRIX REQUIRED FOR INERTIAL RELIEF |
| Cause: | An inertial relief analysis was attempted (PARAM, INREL, ON or PARAM, INERTIALRELIEF, ON) and a singular rigid body mass matrix was encountered. | |
| Action: | Make sure that density is specified for all materials and that the model has a non-zero mass. | |
| Remarks: | None. |