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Silvaco Atlas convergence problem

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Lrecos

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I want to simulate 3d model in Silvaco atlas. It is a simple nwell with n+ structure and a magentic field, but when I simulate it with "solve name=anode ianode=0.001" is there a convergence and I don't know why?
Can anyone please help me....

Enclosed is my code

Code:
go atlas

set w=54
set l=5.2
set a=3.2
set l2=2

mesh three.d

x.m l=0  s=0.2
x.m l=$l+$w+$l s=0.2
y.m l=0 s=0.2
y.m l=1.2  s=0.2
z.m l=0  s=0.2
z.m l=$w+$l+$l s=0.2


region num=1 Silicon y.min=0 y.max=0


region num=2 Silicon x.min=0 x.max=$w+$l+$l y.min=0 y.max=1 z.min=0 z.max=$w+$l+$l

#Anode n+ contact
region num=3 Silicon x.min=$a x.max=$l2+$a y.min=0.8 y.max=1 z.min=$a z.max=$l2+$a
#Cathode n+ contact
region num=4 Silicon x.min=$l+$w x.max=$l+$w+$l2 y.min=0.8 y.max=1 z.min=$l+$w z.max=$l+$w+$l2
#hall4 n+ contact
region num=5 Silicon x.min=$l+$w x.max=$l+$w+$l2 y.min=0.8 y.max=1 z.min=$a z.max=$l2+$a
#hall 3 n+ contact
region num=6 Silicon x.min=$a x.max=$l2+$a y.min=0.8 y.max=1 z.min=$l+$w z.max=$l+$w+$l2


elec num=1 name=anode x.min=$a x.max=$l2+$a y.min=1 y.max=1 z.min=$a z.max=$l2+$a
elec num=2 name=cathode x.min=$l+$w x.max=$l+$w+$l2 y.min=1 y.max=1 z.min=$l+$w z.max=$l+$w+$l2
elec num=3 name=hall4 x.min=$l+$w x.max=$l+$w+$l2 y.min=1 y.max=1 z.min=$a z.max=$l2+$a
elec num=4 name=hall3 x.min=$a x.max=$l2+$a y.min=1 y.max=1 z.min=$l+$w z.max=$l+$w+$l2



doping region=1 conc=1e16 unif p.type
doping region=2 conc=7e16 unif n.type
doping region=3 conc=1e20 unif n.type
doping region=4 conc=1e20 unif n.type
doping region=5 conc=1e20 unif n.type
doping region=6 conc=1e20 unif n.type


contact num=1 current
contact num=3 current
contact num=4 current 


models srh by=0.02

method bicgst

solve init

solve prev

log outfile=magneticex03_1.log
solve name=anode ianode=0.001
log off
 
save outf=magneticex03_1.str
tonyplot3d magneticex03_1.str -set magneticex03_1_str.set

quit
 

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