*HEADING
 RING BUCKLE EIGENVALUE ESTIMATE ( 1 SAXA12 )     
*NODE
 1,100.,0.
 2,100.,1.
*ELEMENT,TYPE=SAXA12,OFFSET=100,ELSET=EALL
  1,1,2  
*ELSET,ELSET=ALL
 1,
*SHELL SECTION,MATERIAL=MAT,ELSET=EALL           
 1.,3
*MATERIAL,NAME=MAT
*ELASTIC
 30.0E6,0.0
*NSET,NSET=NALL
   1,  2
 101,102
 201,202
*EQUATION
 2,
 201,1,1.0,  1,1,-1.0
 2,
 202,1,1.0,  2,1,-1.0
*BOUNDARY
 NALL,2
 NALL,6
*STEP
*BUCKLE
 1,
*DLOAD
 ALL,P,1.0
*MODAL FILE
*OUTPUT,FIELD,VAR=PRESELECT
*END STEP