tttj at NLO

Dear folks,

I am trying to generate tttj process in NLO.

import model loop_sm-no_b_mass
generate p p > t t t~ j aS=2 aEW=2 [QCD]
add process p p > t t~ t~ j aS=2 aEW=2 [QCD]

When I launch output directory, with
order = NLO
fixed_order = OFF
shower = HERWIG6
madspin = ON

After some time I get an error[1].

I also have some messages like:
INFO: The value for lhapdf in the current configuration does not correspond to a valid executable.
Please set it correctly either in input/mg5_configuration or with "set lhapdf /path/to/lhapdf-config" and regenrate the process.
To avoid regeneration, edit the /home/qamar/software/MG5_aMC_v3_4_0/tttj_NLO/Cards/amcatnlo_configuration.txt file.
Note that you can still compile and run aMC@NLO with the built-in PDFs

Is this is the cause or anything else?
Any extra information?

Thanks
Qamar

[1]
INFO: Result for test_MC:
INFO: Passed.
INFO: Result for check_poles:
Error detected in "launch auto "
write debug file /home/qamar/software/MG5_aMC_v3_4_0/tttj_NLO/run_01_tag_1_debug.log
If you need help with this issue, please, contact us on https://answers.launchpad.net/mg5amcnlo
str : Poles do not cancel, run cannot continue
quit
INFO: