*HEADING
: EIGENVALUE ANALYSIS OF AN UNCONSTRAINED 1-ELEMENT MESH  [T3D3]
*PREPRINT,ECHO=YES,HISTORY=NO,MODEL=NO
*NODE,NSET=NALL
1,0.
2,1.,2.,3,
 3,.5,1.,1.5
*ELEMENT,TYPE=T3D3, ELSET=EALL
 1,1,3,2
*MATERIAL,NAME=A1
*ELASTIC
30.E6, 
*DENSITY
7.5E-4, 
*SOLID SECTION,MATERIAL=A1, ELSET=EALL
 .1, 
*STEP
*FREQUENCY, eigensolver=lanczos
9, , ,-1.E7 
*OUTPUT,HISTORY,FREQUENCY=1
*MODAL OUTPUT
*END STEP