error standalone output

[Jordy Degens]

I want to calculate matrix elements with madgraph_2_6_0 and use the following guide

https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/FAQ-General-4#Fulllibraryofprocessinpython

the command I use is:

import model HC_NLO_X0_UFO-heft

define p = g u c d s b u~ c~ d~ s~ b~
define j = g u c d s b u~ c~ d~ s~ b~

generate p p > X0 / t @0
add process p p > X0 j / t @1
add process p p > X0 j j / t @2
add process p p > X0 j j j / t @3

output standalone $CMSSW_BASE/src/CMSAachen3B/GeneratorTools/data/ggh --prefix=int

however when I create the standalone package I get the error
TypeError : subn() got an unexpected keyword argument 'flags'

[Olivier Mattelaer (olivier-mattelaer)]

Do you have the debug file associate to the crash?
This can be usefull

Can you also specify which python version you are using?

Thanks,

Olivier

[Olivier Mattelaer (olivier-mattelaer)]

Actually I have found the problem.

Here is a simple patch (using python2.7 would also solve the problem):

Thanks for the feedback.

Olivier

=== modified file 'madgraph/iolibs/export_v4.py'
--- madgraph/iolibs/export_v4.py 2017-09-14 22:17:09 +0000
+++ madgraph/iolibs/export_v4.py 2017-11-08 17:27:32 +0000
@@ -2270,7 +2270,8 @@

         if proc_prefix and os.path.exists(pjoin(dirpath, '..', 'check_sa.f')):
             text = open(pjoin(dirpath, '..', 'check_sa.f')).read()
- new_text, n = re.subn('smatrix', '%ssmatrix' % proc_prefix, text, flags=re.I)
+ pat = re.compile('smatrix', re.I)
+ new_text, n = re.subn(pat, '%ssmatrix' % proc_prefix, text)
             with open(pjoin(dirpath, 'check_sa.f'),'w') as f:
                 f.write(new_text)
             linkfiles.pop(0)