| E5000 | FATAL ERROR: E5000 | SINGULARITY DETECTED AT GRID id COMPONENT n |
| Cause: | A singularity has been detected in the stiffness matrix during decomposition. | |
| Action: | Investigate the degree of freedom at which the singularity occurred for a lack of stiffness. Also, check your model for a lack of constraint. If using shell elements, either set the K6ROT model parameter to a value between 1.0 and 100.0, or set the SHELLRNODE model parameter to ON. If this does not solve the problem or you are unable to locate the source of the singularity, consider setting the SOLUTIONERROR model parameter to ON. Note that solution accuracy may be degraded with this parameter set to ON. Check the EPSILON value in the Model Results Output or Results Summary File. Values greater than 0.001 indicate a possible loss of accuracy. | |
| Remarks: | See Autodesk Nastran Reference Guide, Section 5, Parameters, for more information on the K6ROT, SHELLRNODE, and SOLUTIONERROR parameters. |