*HEADING                                           
 TEST OF ELEMENT MATRIX OUTPUT -  
 ELEMENT: S4R5
*NODE
 1, 0.0, 0.0
 2, 2.0, 0.0
 3, 2.0, 1.0
 4, 0.0, 1.0
*ELEMENT,TYPE=S4R5,ELSET=EALL
 1, 1,2,3,4
*SHELL SECTION,MATERIAL=A1,ELSET=EALL
 1.0, 
*MATERIAL,NAME=A1
*ELASTIC,TYPE=ISOTROPIC
 30.0E6,0.3
*BOUNDARY
 1,1,5
 2,2,3
 3,3
 4,3
*STEP,PERTURB
*STATIC
*CLOAD
 2,1, 1500.0
 3,1, -500.0
 3,2,  500.0
 4,1,-1500.0
 4,2, 1500.0
*ELEMENT MATRIX OUTPUT,ELSET=EALL,STIFF=Y
*ELEMENT MATRIX OUTPUT,ELSET=EALL,STIFF=Y,OUTPUT=USER
*OUTPUT,HISTORY,FREQUENCY=1
*ENERGY OUTPUT,VARIABLE=PRESELECT
*OUTPUT,FIELD
*NODE OUTPUT
U,
*NODE PRINT
 U,
*END STEP
*STEP,PERTURB
Check that matrix output in previous step does not affect subsequent
steps.  Results for this step should be same as previous step
*STATIC
*CLOAD
 2,1, 1500.0
 3,1, -500.0
 3,2,  500.0
 4,1,-1500.0
 4,2, 1500.0
*ELEMENT MATRIX OUTPUT,ELSET=EALL,STIFF=Y
*ELEMENT MATRIX OUTPUT,ELSET=EALL,STIFF=Y,OUTPUT=USER
*OUTPUT,FIELD
*NODE OUTPUT
U,
*NODE PRINT
 U,
*END STEP