*HEADING
 Substructure test, frequency extraction
 SUBSTRUCTURE GENERATION FILE psupfre1_gen1.inp SHOULD BE RUN FIRST. 
*PREPRINT,MODEL=YES,HISTORY=YES
** ----------------------- Usage Level
*NODE,NSET="GLOBAL NODES"
 1, 0.2,  0.0
 2, 0.5,  0.0
 3, 1.0,  0.0
*ELEMENT, TYPE=Z1, ELSET="LEFT SIDE", FILE=psupfre1_gen1
 1,1,2,3
*SUBSTRUCTURE PROPERTY,ELSET="LEFT SIDE"
*RESTART,WRITE
** ----------------------- Analysis
*STEP
*FREQUENCY,EIGENSOLVER=SUBSPACE, SIM
 3,,
*NODE FILE,NSET="GLOBAL NODES"
U,RF
*NODE PRINT,NSET="GLOBAL NODES"
U,RF
*SUBSTRUCTURE PATH,ENTER=1
*OUTPUT,FIELD,VAR=PRESELECT
*NODE PRINT,NSET="ALL NODES"
 U,
*NODE FILE,NSET="ALL NODES"
 U,
*EL PRINT
*SUBSTRUCTURE PATH,LEAVE
*END STEP