Hi,

Sorry I'm one day late on this thread. 
The problem is linked to the dynamical scale choice.
So one easy way to fix the problem is to not use the default dynamical scale choice
but a simpler one (like sum HT/2/...)

Another solution is to use the following patch.
This is not yet fully tested (such change can have huge impact on MLM merging and i have to be carefull about that.) but it solve the problem of the directory that you point out.

Thanks a lot for such report,

Olivier

=== modified file 'Template/LO/SubProcesses/reweight.f'
--- Template/LO/SubProcesses/reweight.f	2018-03-11 12:29:51 +0000
+++ Template/LO/SubProcesses/reweight.f	2018-06-07 19:04:43 +0000
@@ -545,6 +545,7 @@
       logical chclusold,fail,increasecode
       save chclusold
       integer tmpindex
+      integer pdgm, pdgid1, pdgid2

       logical isqcd,isjet,isparton,cluster,isjetvx,is_octet
       integer ifsno
@@ -746,8 +747,17 @@
 c          The ishft gives the FS particle corresponding to imocl
               if(.not.is_octet(ipdgcl(ishft(1,ipart(1,imocl(n))-1),igraphs(1),iproc)))then
                  ! split case for q a > q and for g > g h (with the gluon splitting into quark)
-                 if (ipart(2,imocl(n)).eq.0) then ! q a > q case
-                    iqjets(ipart(1,imocl(n)))=0
+c                ! also check for case of three scalar interaction (then do nothing)
+                 pdgm   = ipdgcl(imocl(n),igraphs(1),iproc)
+                 pdgid1 = ipdgcl(idacl(n,1),igraphs(1),iproc)
+                 pdgid2 = ipdgcl(idacl(n,2),igraphs(1),iproc)
+
+                 if (.not.isqcd(pdgm).and..not.isqcd(pdgid1).and..not.isqcd(pdgid2)) then
+                    ! this is to avoid to do weird stuff for w+ w- z (or h h h)
+                    ! this fix an issue for qq_zttxqq G1594.08
+                     continue
+                 elseif (ipart(2,imocl(n)).eq.0) then ! q a > q case
+                       iqjets(ipart(1,imocl(n)))=0
                  else ! octet. want to be sure that both are tagged as jet before removing one
                     ! this prevent that both are removed in case of g > g h , g > q1 q2, q1 > a q1.
                     ! at least one of the two should be kept as jet



> On 4 Jun 2018, at 19:11, jackaraz <email address hidden> wrote:
> 
> Dear Oliver
> 
> Additional info:
> 
> I got the very same error in a similar process. Here is how I produced
> it (please note that I'm getting the errors at the very end and it takes
> a while to generate it.)
> 
> define w = w- w+
> generate p p > w t t~ j j QED<=5
> 
> COM Energy 14 TeV, all cuts are the default.
> 
> Thank you very much
> 
> Best regards
> 
> -- 
> You received this bug notification because you are subscribed to
> MadGraph5_aMC@NLO.
> https://bugs.launchpad.net/bugs/1774664
> 
> Title:
>  results.dat not found
> 
> Status in MadGraph5_aMC@NLO:
>  New
> 
> Bug description:
>  Hi I'm having the exact same problem mentioned in
>  ~/mg5amcnlo/+question/219819
> 
>  the only difference is I'm using my workstation, multicore not cluster and I've been getting this error for multiple times, for different processes.
>  "
>  Error when reading /home/jack/packages/MG5_aMC_v2_6_2/Generic_zttjj/SubProcesses/P1_qq_zttxqq/G1594.08/results.dat
>  Command "generate_events run_01" interrupted with error:
>  IOError : [Errno 2] No such file or directory: '/home/jack/packages/MG5_aMC_v2_6_2/Generic_zttjj/SubProcesses/P1_qq_zttxqq/G1594.08/results.dat'
>  Please report this bug on https://bugs.launchpad.net/mg5amcnlo
>  More information is found in '/home/jack/packages/MG5_aMC_v2_6_2/Generic_zttjj/run_01_tag_1_debug.log'.
>  Please attach this file to your report.
>  "
>  As mentioned in the link, the problem is related to writing HTML file according to the debug file which I'm pasting below. Could you please help me to solve the issue, thanks
> 
>  Jack
> 
> 
>  ---------------
> 
> 
>  generate_events run_01
>  Traceback (most recent call last):
>    File "/home/jack/packages/MG5_aMC_v2_6_2/madgraph/interface/extended_cmd.py", line 1501, in onecmd
>      return self.onecmd_orig(line, **opt)
>    File "/home/jack/packages/MG5_aMC_v2_6_2/madgraph/interface/extended_cmd.py", line 1450, in onecmd_orig
>      return func(arg, **opt)
>    File "/home/jack/packages/MG5_aMC_v2_6_2/madgraph/interface/madevent_interface.py", line 2467, in do_generate_events
>      self.run_generate_events(switch_mode, args)
>    File "/home/jack/packages/MG5_aMC_v2_6_2/madgraph/interface/common_run_interface.py", line 6685, in new_fct
>      original_fct(obj, *args, **opts)
>    File "/home/jack/packages/MG5_aMC_v2_6_2/madgraph/interface/madevent_interface.py", line 2509, in run_generate_events
>      self.exec_cmd('refine %s' % nb_event, postcmd=False)
>    File "/home/jack/packages/MG5_aMC_v2_6_2/madgraph/interface/extended_cmd.py", line 1528, in exec_cmd
>      stop = Cmd.onecmd_orig(current_interface, line, **opt)
>    File "/home/jack/packages/MG5_aMC_v2_6_2/madgraph/interface/extended_cmd.py", line 1450, in onecmd_orig
>      return func(arg, **opt)
>    File "/home/jack/packages/MG5_aMC_v2_6_2/madgraph/interface/madevent_interface.py", line 3419, in do_refine
>      x_improve.launch() # create the ajob for the refinment.
>    File "/home/jack/packages/MG5_aMC_v2_6_2/madgraph/madevent/gen_ximprove.py", line 861, in launch
>      main_dir=pjoin(self.cmd.me_dir,'SubProcesses'))  #main_dir is for gridpack readonly mode
>    File "/home/jack/packages/MG5_aMC_v2_6_2/madgraph/madevent/sum_html.py", line 728, in collect_result
>      P_comb.add_results(os.path.basename(G), path, mfactors[G])
>    File "/home/jack/packages/MG5_aMC_v2_6_2/madgraph/madevent/sum_html.py", line 412, in add_results
>      oneresult.read_results(filepath)
>    File "/home/jack/packages/MG5_aMC_v2_6_2/madgraph/madevent/sum_html.py", line 279, in read_results
>      finput = open(filepath)
>  IOError: [Errno 2] No such file or directory: '/home/jack/packages/MG5_aMC_v2_6_2/Generic_zttjj/SubProcesses/P1_qq_zttxqq/G1594.08/results.dat'
>  Related File: /home/jack/packages/MG5_aMC_v2_6_2/Generic_zttjj/SubProcesses/P1_qq_zttxqq/G1594.08/results.dat
>                                Run Options    
>                                -----------    
>                 stdout_level 	:	20 (user set)
> 
>                           MadEvent Options    
>                           ----------------    
>       automatic_html_opening 	:	False (user set)
>          notification_center 	:	True
>            cluster_temp_path 	:	None
>               cluster_memory 	:	None (user set)
>                 cluster_size 	:	100
>                cluster_queue 	:	None (user set)
>                      nb_core 	:	8 (user set)
>                 cluster_time 	:	8 (user set)
>                     run_mode 	:	2
> 
>                        Configuration Options    
>                        ---------------------    
>                  text_editor 	:	emacs -nw (user set)
>           cluster_local_path 	:	None
>        cluster_status_update 	:	(600, 30)
>                 pythia8_path 	:	None (user set)
>                    hwpp_path 	:	None (user set)
>              pythia-pgs_path 	:	None (user set)
>                      td_path 	:	None (user set)
>                 delphes_path 	:	None (user set)
>                  thepeg_path 	:	None (user set)
>                 cluster_type 	:	condor
>            madanalysis5_path 	:	None (user set)
>             cluster_nb_retry 	:	1
>                   eps_viewer 	:	None
>                  web_browser 	:	None
>                 syscalc_path 	:	None (user set)
>             madanalysis_path 	:	None (user set)
>                       lhapdf 	:	lhapdf-config
>                f2py_compiler 	:	None
>                   hepmc_path 	:	None (user set)
>           cluster_retry_wait 	:	300
>             fortran_compiler 	:	None
>                  auto_update 	:	7 (user set)
>          exrootanalysis_path 	:	None (user set)
>                      timeout 	:	60
>                 cpp_compiler 	:	None
> 
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/mg5amcnlo/+bug/1774664/+subscriptions