*HEADING
 BASIC VERIFICATION OF MPC TYPE PLINEAR
*NODE
 1, 1.
 5, 4.
21, 1., 5.
25, 4., 5.
*NGEN,NSET=BOT
1,5
*NGEN,NSET=TOP
21,25
*NFILL,NSET=NALL
BOT,TOP,4,5
*NSET,NSET=CORNERS1
 1,5
*NSET,NSET=CORNERS2
5,15,25
*NSET,NSET=CORNERS3
21,23,25
*NSET,NSET=CORNERS4
 1,11,21
*NSET,NSET=CORNERS
1,5,21,25
*ELEMENT,TYPE=CPE8P,ELSET=EALL
 1,  1, 5,15,11, 3,10,13, 6
 2, 11,13,23,21,12,18,22,16
 3, 13,15,25,23,14,20,24,18
*MPC
P LINEAR,13,11,15
QUADRATIC,12,11,13,15
QUADRATIC,14,11,13,15
*SOLID SECTION,MATERIAL=A1,ELSET=EALL
*MATERIAL,NAME=A1
*ELASTIC
 1.E8, 
*PERMEABILITY,SPECIFIC=1.0
 1.E-5, 
*INITIAL CONDITIONS,TYPE=RATIO
NALL,1.
*AMPLITUDE, NAME=RAMPP
0.,0.,  1.,1.
*RESTART,WRITE
*STEP
*SOILS,END=PERIOD
 1. , 1.
*EL FILE
 LOADS,
*OUTPUT,FIELD
*ELEMENT OUTPUT
LOADS,
*NODE FILE
 RF, 
 POR, 
*OUTPUT,FIELD
*NODE OUTPUT
RF,
POR,
*EL PRINT
 LOADS,
*NODE PRINT
 RF, 
 POR, 
*BOUNDARY
 NALL, 1,2
 CORNERS1, 8
*DFLOW, OP=MOD, AMPLITUDE=RAMPP
 2, S3, 3.E-5
 3, S3, 3.E-5
*END STEP
*STEP
*SOILS,END=PERIOD
 1., 1.
*BOUNDARY, OP=NEW
 NALL, 1,2
 CORNERS2, 8
*DFLOW, OP=NEW, AMPLITUDE=RAMPP
 1, S4, 3.E-5
 2, S4, 3.E-5
*END STEP