| E5063 | FATAL ERROR: E5063 | NON-SINGULAR MASS MATRIX REQUIRED FOR COMPLEX MODAL ANALYSIS |
| Cause: | In MODAL COMPLEX EIGENVALUE solutions, a non-singular, non-zero global mass matrix is required to extract complex eigenvalues and eigenvectors. | |
| Action: | If the mass matrix is non-zero, set PARAM, COUPMASS, OFF to specify diagonal mass matrix formulation. For a zero mass matrix, see message E5058. | |
| Remarks: | See Autodesk Nastran Reference Guide, Section 5, Parameters, for parameter format. |