InvalidCmd : No amplitudes generated from process

Dear experts,

in the 5FS scheme I am generating:

set group_subprocesses Auto
Set group_subprocesses to Auto
Note that you need to regenerate all processes
set ignore_six_quark_processes False
set loop_optimized_output True
set loop optimized output to True
set gauge unitary
Passing to gauge unitary.
set complex_mass_scheme False
import model loop_sm-no_b_mass
INFO: load particles
INFO: load vertices
INFO: Restrict model loop_sm with file models/loop_sm/restrict_no_b_mass.dat .
INFO: Run "set stdout_level DEBUG" before import for more information.
INFO: Change particles name to pass to MG5 convention
Defined multiparticle p = g u c d s u~ c~ d~ s~
Defined multiparticle j = g u c d s u~ c~ d~ s~
Defined multiparticle l+ = e+ mu+
Defined multiparticle l- = e- mu-
Defined multiparticle vl = ve vm vt
Defined multiparticle vl~ = ve~ vm~ vt~
Defined multiparticle all = g gh gh~ d u s c b d~ u~ s~ c~ b~ a ve vm vt e- mu- ve~ vm~ vt~ e+ mu+ t t~ z w+ h w- ta- ta+
Switching from interface MG5 to aMC@NLO
define l+ = e+ mu+ ta+
Defined multiparticle l+ = e+ mu+ ta+
define l- = e- mu- ta-
Defined multiparticle l- = e- mu- ta-
define j = j b b~
Defined multiparticle j = g u c d s b u~ c~ d~ s~ b~
define p = j
Defined multiparticle p = g u c d s b u~ c~ d~ s~ b~
define t1 = t t~
Defined multiparticle t1 = t t~
generate p p > t1 h j $$ w+ w- [QCD]

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All works fine then, I get a nice cross section, in the MadSpin section, however, it fails due to some reason I do not understand. Maybe an incorrect syntax in the decay? here I give the screen output:

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************************************************************
* *
* W E L C O M E to M A D S P I N *
* *
************************************************************
INFO: Extracting the banner ...
INFO: process: p p > t1 h j
INFO: options: $$ w+ w-
INFO: detected model: loop_sm-no_b_mass. Loading...
WARNING: The UFO model does not include partial widths information.
Impossible to use analytical formula, will use MG5/MadEvent (slower).
#************************************************************
#* MadSpin *
#* *
#* P. Artoisenet, R. Frederix, R. Rietkerk, O. Mattelaer *
#* *
#* Part of the MadGraph 5 Framework: *
#* The MadGraph Development Team - Please visit us at *
#* https://server06.fynu.ucl.ac.be/projects/madgraph *
#* *
#************************************************************
#Some options (optional)
#
# set seed 1
# set max_weight -1
#
#
# specify the decay for the final state particles
decay h > b b~
decay t~ > w- b~, w- > l- vl~
decay t > w+ b, w+ > l+ vl
# running the actual code
launch
INFO: Will use seed 859922249
INFO: We need to recalculate the branching fractions
INFO: compute_width module not available, use numerical estimates instead
INFO:
INFO: decay channels for t~ :
INFO: BR d1 d2
INFO: 1.000000e+00 b~ w-
INFO:
INFO:
INFO: decay channels for h :
INFO: BR d1 d2
INFO: 1.000000e+00 ta+ ta-
INFO:
INFO:
INFO: decay channels for w- :
INFO: BR d1 d2
INFO: 3.333610e-01 s c~
INFO: 3.333610e-01 d u~
INFO: 1.111195e-01 mu- vm~
INFO: 1.111195e-01 e- ve~
INFO: 1.110390e-01 ta- vt~
INFO:
INFO:
INFO: decay channels for w+ :
INFO: BR d1 d2
INFO: 3.333610e-01 s~ c
INFO: 3.333610e-01 d~ u
INFO: 1.111195e-01 mu+ vm
INFO: 1.111195e-01 e+ ve
INFO: 1.110390e-01 ta+ vt
INFO:
INFO:
INFO: decay channels for t :
INFO: BR d1 d2
INFO: 1.000000e+00 b w+
INFO:
INFO: generating the production square matrix element
INFO: generate p p > t1 h j $$ w+ w- ;add process p p > t1 h j j $$ w+ w- ;
INFO: Done 26.58
INFO: generating the full square matrix element (with decay)
INFO: generate p p > t1 h j $$ w+ w- , (t~ > b~ w- , w- > l- vl~ ), h > b b~ , (t > b w+ , w+ > l+ vl );add process p p > t1 h j j $$ w+ w- , (t~ > b~ w- , w- > l- vl~ ), h > b b~ , (t > b w+ , w+ > l+ vl ) ;
Command "generate p p > t1 h j $$ w+ w- , (t~ > b~ w- , w- > l- vl~ ), h > b b~ , (t > b w+ , w+ > l+ vl )" interrupted with error:
InvalidCmd : No amplitudes generated from process Process: h > b b~ WEIGHTED=4. Please enter a valid process
Command "add process p p > t1 h j j $$ w+ w- , (t~ > b~ w- , w- > l- vl~ ), h > b b~ , (t > b w+ , w+ > l+ vl ) " interrupted in sub-command:
"add process p p > t1 h j j $$ w+ w- , (t~ > b~ w- , w- > l- vl~ ), h > b b~ , (t > b w+ , w+ > l+ vl )" with error:
InvalidCmd : No amplitudes generated from process Process: h > b b~ WEIGHTED=4. Please enter a valid process
Command "launch auto " interrupted with error:
InvalidCmd : No processes generated. Please generate a process first.
quit

quit

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Do you have an idea what is going wrong?

Thank you for all your help here, this forum helps us a lot!

ben