*HEADING
EC34SFE1: EIGENVALUE ANALYSIS OF AN UNCONSTRAINED 1-ELEMENT MESH  [C3D4]
*PREPRINT,ECHO=YES,HISTORY=YES,MODEL=YES
*NODE
 1, 0.0, 0.0, 0.0
 2, 2.0, 0.0, 0.0
 3, 2.0, 2.0, 0.0
 4, 0.0, 2.0, 0.0
 5, 0.0, 0.0, 1.0
 6, 2.0, 0.0, 1.0
 7, 2.0, 2.0, 1.0
 8, 0.0, 2.0, 1.0
*ELEMENT,TYPE=C3D4, ELSET=EALL
 1, 1,2,3,6
*SOLID SECTION,MATERIAL=A1, ELSET=EALL
*MATERIAL,NAME=A1
*ELASTIC
 3.E6,0.3
*DENSITY
7.5E-4, 
*STEP
*FREQUENCY, eigensolver=lanczos, SIM=NO
9, , ,-1.E6 
*END STEP