Poles do not cancel when generating NLO events.

I receive an error when generating events for a process. Perhaps there is a simple fix somewhere but I have yet find it.

my process is
> generate p p > t z b~ j [QCD]

And I am changing nothing from what is set up by default except for the Shower setting is set to off. Maybe there are some settings I haven't messed with that can help me? I had no problems running LO for this process.

Here is the information :

INFO: ************************************************************
* *
* W E L C O M E to M A D G R A P H 5 *
* a M C @ N L O *
* *
* * * *
* * * * * *
* * * * * 5 * * * * *
* * * * * *
* * * *
* *
* VERSION 5.2.2.3 *
* *
* The MadGraph5_aMC@NLO Development Team - Find us at *
* http://amcatnlo.cern.ch *
* *
* Type 'help' for in-line help. *
* *
************************************************************
INFO: load configuration from /Users/HEP/MG5_aMC_v2_2_3/bin/pp_tzb~j_NLO/Cards/amcatnlo_configuration.txt
INFO: load configuration from /Users/HEP/MG5_aMC_v2_2_3/input/mg5_configuration.txt
INFO: load configuration from /Users/HEP/MG5_aMC_v2_2_3/bin/pp_tzb~j_NLO/Cards/amcatnlo_configuration.txt
Using default text editor "vi". Set another one in ./input/mg5_configuration.txt
launch
INFO: Enter mode value: Go to the related mode
The following switches determine which operations are executed:
 1 Perturbative order of the calculation: order=NLO
 2 Fixed order (no event generation and no MC@[N]LO matching): fixed_order=ON
 3 Shower the generated events: shower=OFF
 4 Decay particles with the MadSpin module: madspin=OFF
  Either type the switch number (1 to 4) to change its default setting,
  or set any switch explicitly (e.g. type 'order=LO' at the prompt)
  Type '0', 'auto', 'done' or just press enter when you are done.
 [0, 1, 2, 3, 4, auto, done, order=LO, order=NLO, ... ][60s to answer]
>
INFO: will run in mode: NLO
Do you want to edit a card (press enter to bypass editing)?
  1 / param : param_card.dat
  2 / run : run_card.dat
  3 / FO_analyse : FO_analyse_card.dat
 you can also
   - enter the path to a valid card or banner.
   - use the 'set' command to modify a parameter directly.
     The set option works only for param_card and run_card.
     Type 'help set' for more information on this command.
   - call an external program (ASperGE/MadWidth/...).
     Type 'help' for the list of available command
 [0, done, 1, param, 2, run, 3, FO_analyse, enter path][60s to answer]
>
INFO: Starting run
INFO: Compiling the code
INFO: For gauge cancellation, the width of 't' has been set to zero.
INFO: Using built-in libraries for PDFs
INFO: Compiling source...
INFO: ...done, continuing with P* directories
INFO: Compiling directories...
INFO: Compiling on 4 cores
INFO: Compiling P0_gu_ztbxd...
INFO: Compiling P0_ug_ztbxd...
INFO: Compiling P0_gdx_ztbxux...
INFO: Compiling P0_udx_ztbxg...
INFO: P0_gu_ztbxd done.
INFO: Compiling P0_dxg_ztbxux...
INFO: P0_gdx_ztbxux done.
INFO: Compiling P0_dxu_ztbxg...
INFO: P0_ug_ztbxd done.
INFO: P0_udx_ztbxg done.
INFO: P0_dxg_ztbxux done.
INFO: P0_dxu_ztbxg done.
INFO: Checking test output:
INFO: P0_gu_ztbxd
INFO: Result for test_ME:
INFO: Passed.
INFO: Result for check_poles:
Error detected in "launch "
write debug file /Users/HEP/MG5_aMC_v2_2_3/bin/pp_tzb~j_NLO/run_06_tag_1_debug.log
If you need help with this issue please contact us on https://answers.launchpad.net/madgraph5
aMCatNLOError : Poles do not cancel, run cannot continue
quit