Vector potential problem 
Magnetic shielding produced by thin, highly permeable sheet
Geometry has very large changes in triangle size near the metal.
[Originally appeared in 1987 User's Manual 10.7]

; Copyright 1987, by the University of California. 
; Unauthorized commercial use is prohibited. 
                      
&reg kprob=0,             ; Poisson or Pandira problem
mode=-1,                  ; Use fixed but finite permeability
fixgam=0.00005,           ; Reluctivity
nbslo=0,                  ; Dirichlet boundary condition on lower edge
nbsup=0,                  ; Dirichlet boundary condition on upper edge
nbslf=1,                  ; Neumann boundary condition on left edge
nbsrt=1,                  ; Neumann boundary condition on right edge
; Define X (physical) and K (logical) line regions:
xreg1=175.2,kreg1=36, 
xreg2=175.4,kreg2=40, 
kmax=86                   ; Logical coordinate for XMAX
; Define Y (physical) and L (logical) line regions:
yreg1=129.5,lreg1=26, 
yreg2=129.7,lreg2=30,     
lmax=76  &                ; Logical coordinate for YMAX

&po x=0.0,y=0.0 &               ; Rectangular box 
&po x=400.4,y=0.0 &
&po x=400.4,y=354.7 &
&po x=0.0,y=354.7 &
&po x=0.0,y=0.0 &

&reg mat=2 &                    ; Thin permeable metal box
&po x=175.2,y=0.0 &
&po x=175.4,y=0.0 &
&po x=175.4,y=129.7 &
&po x=0.0,y=129.7 &
&po x=0.0,y=129.5 &
&po x=175.2,y=129.5 &
&po x=175.2,y=0.0 &

&reg mat=1,cur=10.0,ibound=-1 &  ; Current sheet along lower edge
&po x=0.0,y=0.0 &
&po x=400.4,y=0.0 &

&reg mat=1,cur=188.0,ibound=-1 & ; Current sheet along upper edge
&po x=0.0,y=354.7 &
&po x=400.4,y=354.7 &