| E5102 | FATAL ERROR: E5102 | NON-NULL OMIT SET REQUIRED FOR MATRIX REDUCTION |
| Cause: | The OMIT set consists of degrees of freedom that are to be removed from the analysis set and is defined either by the ASET which consists of degrees of freedom that are retained or the OMIT set which contains degrees of freedom to be removed. A non-null OMIT set is required for matrix reduction. | |
| Action: | Correct the ASET or OMIT Bulk Data entries or XSETGENERATE Case Control command, as applicable. | |
| Remarks: | See Autodesk Nastran Reference Guide, Section 3, Case Control, for command format, and Section 4, Bulk Data, for entry format. |