*HEADING
: EIGENVALUE ANALYSIS OF AN UNCONSTRAINED 1-ELEMENT MESH  [SAXA11]
*PREPRINT,ECHO=YES,HISTORY=NO,MODEL=NO
*NODE,NSET=NALL
 1, 5., 2.
 3, 5., 12.
*ELEMENT,TYPE=SAXA11, ELSET=EALL
 1, 1,3
*SHELL SECTION,MATERIAL=MAT1, ELSET=EALL
 .1, 3
*MATERIAL,NAME=MAT1
*ELASTIC
 30.E6, .3
*DENSITY
7.5E-4, 
*STEP
*FREQUENCY, eigensolver=lanczos
7, , ,-1.E7 
*OUTPUT,HISTORY,FREQUENCY=1
*MODAL OUTPUT
*END STEP