Dynamic problem analysis - block falling onto a spring loaded platform in Fidesys 4.0

reset
brick x 1 y 1 z 1
move Volume 1  z 1 include_merged 
brick x 1 y 1 z 0.1
create vertex 0 0 -0.5 
webcut volume 1 2  with plane yplane merge 
webcut volume all with plane xplane merge 
create curve vertex 42 17  
merge vertex 66 42  
volume all size auto factor 9
undo group begin
volume all size auto factor 9
mesh volume all
undo group end
create material 1
modify material 1 name 'Brick'
create material 2
modify material 2 name 'Platform'
modify material 1 set property 'MODULUS' value 2e+11
modify material 1 set property 'POISSON' value 0.3
modify material 1 set property 'DENSITY' value 30
modify material 2 set property 'MODULUS' value 2e+11
modify material 2 set property 'POISSON' value 0.3
modify material 2 set property 'DENSITY' value 100
set duplicate block elements off
block 1 add volume 5 7 3 1 
block 1 name 'BLCK'
set duplicate block elements off
block 2 add volume 6 8 4 2 
block 2 name 'Platform'
set duplicate block elements off
block 3 add curve 121 
block 3 name 'SPRNG'
curve 121  interval 1
curve 121  scheme equal
mesh curve 121 
block 'BLCK' material 1 cs 1 element solid order 1
block 'Platform' material 2 cs 1 element solid order 1
create spring properties 1
modify spring properties 1 type 'linear_spring'
modify spring properties 1 spring_constant_damping 0
modify spring properties 1 spring_linear_damping 0
modify spring properties 1 spring_mass 0.00001
modify spring properties 1 stiffness 20000
modify spring properties 1 stiffness_torsional 0
modify spring properties 1 spring_mass 0.00001
block 'SPRNG' material 2 element spring
block 'SPRNG' spring properties 1
create displacement  on vertex 17  dof 1 dof 2 dof 3 fix  
create displacement  on surface 49 71 65 47 39 61 55 37  dof 1 dof 2 fix  
create gravity on volume 5 7 3 1 
modify gravity 1 dof 3 value -9.81
create gravity on volume 5 7 3 1 
modify gravity 2 dof 3 value -9.81
delete gravity 2 
delete gravity 1 
create gravity on volume 5 7 3 1 
modify gravity 1 dof 3 value -9.81
create contact master surface 71 65 49 47  slave surface 59 41 35 57  tolerance 0.0005 type general friction 0.0 preload 0.0 offset 0.0 ignore_overlap off method auto
move Volume 3 1 5 7  z -0.45 include_merged 
create initial velocity on volume 3 1 5 7 
modify initial velocity 1 dof 3 value -6.26
analysis type dynamic elasticity dim3 preload off
dynamic method full_solution scheme implicit maxtime 0.08 steps 20 newmark_gamma 0.005
calculation start path 'C:/Users/User/Documents/CAE-Fidesys-4.0/block-platform-spring.pvd'