*HEADING
: EIGENVALUE ANALYSIS OF AN UNCONSTRAINED 1-ELEMENT MESH  [CPEG4RH]
*PREPRINT,ECHO=YES,HISTORY=NO,MODEL=NO
*NODE,NSET=NALL
 1,0.,0.
 3,7.,0.
 7,0.,7.
 9,7.,7.
*NODE
 101,0.,0.
*ELEMENT,TYPE=CPEG4RH,ELSET=EALL
 1,1,3,9,7
*SOLID SECTION,MATERIAL=A1,ELSET=EALL,REFNODE=101
*MATERIAL,NAME=A1
*ELASTIC
 3.E6,.3
*DENSITY
 7.5E-4, 
*STEP
*FREQUENCY, eigensolver=lanczos, SIM=NO
 7, , ,-1.E7 
*MODAL FILE
*OUTPUT,HISTORY,FREQUENCY=1
*MODAL OUTPUT
*END STEP