diff --git a/Configuration/Generator/python/DYToLL012Jets_5FS_TuneCH3_13TeV_amcatnloFxFx_herwig7_cff.py b/Configuration/Generator/python/DYToLL012Jets_5FS_TuneCH3_13TeV_amcatnloFxFx_herwig7_cff.py
index 3b89a0fc18b76..6e782c8fd75ba 100644
--- a/Configuration/Generator/python/DYToLL012Jets_5FS_TuneCH3_13TeV_amcatnloFxFx_herwig7_cff.py
+++ b/Configuration/Generator/python/DYToLL012Jets_5FS_TuneCH3_13TeV_amcatnloFxFx_herwig7_cff.py
@@ -38,7 +38,9 @@
     nEvents = cms.untracked.uint32(5000),
     numberOfParameters = cms.uint32(1),
     outputFile = cms.string('cmsgrid_final.lhe'),
-    scriptName = cms.FileInPath('GeneratorInterface/LHEInterface/data/run_generic_tarball_cvmfs.sh')
+    scriptName = cms.FileInPath('GeneratorInterface/LHEInterface/data/run_generic_tarball_cvmfs.sh'),
+    generateConcurrently = cms.untracked.bool(True),
+    postGenerationCommand = cms.untracked.vstring('mergeLHE.py', '-i', 'thread*/cmsgrid_final.lhe', '-o', 'cmsgrid_final.lhe')
 )
 
 
diff --git a/Configuration/Generator/python/DYToll01234Jets_5f_LO_MLM_Madgraph_LHE_13TeV_cff.py b/Configuration/Generator/python/DYToll01234Jets_5f_LO_MLM_Madgraph_LHE_13TeV_cff.py
index 36302f068f724..eaf6117727add 100644
--- a/Configuration/Generator/python/DYToll01234Jets_5f_LO_MLM_Madgraph_LHE_13TeV_cff.py
+++ b/Configuration/Generator/python/DYToll01234Jets_5f_LO_MLM_Madgraph_LHE_13TeV_cff.py
@@ -6,5 +6,6 @@
   numberOfParameters = cms.uint32(4),
   args = cms.vstring('/cvmfs/cms.cern.ch/phys_generator/gridpacks/UL/13TeV/madgraph/V5_2.6.5/dyellell01234j_5f_LO_MLM_v2/DYJets_HT-incl_slc6_amd64_gcc630_CMSSW_9_3_16_tarball.tar.xz','false','slc6_amd64_gcc630','CMSSW_9_3_16'),
   nEvents = cms.untracked.uint32(10),
-  generateConcurrently = cms.untracked.bool(True)
+  generateConcurrently = cms.untracked.bool(True),
+  postGenerationCommand = cms.untracked.vstring('mergeLHE.py', '-i', 'thread*/cmsgrid_final.lhe', '-o', 'cmsgrid_final.lhe'),
 )
diff --git a/Configuration/PyReleaseValidation/python/relval_extendedgen.py b/Configuration/PyReleaseValidation/python/relval_extendedgen.py
index f0d52613f8a20..233578a08bab4 100644
--- a/Configuration/PyReleaseValidation/python/relval_extendedgen.py
+++ b/Configuration/PyReleaseValidation/python/relval_extendedgen.py
@@ -23,9 +23,9 @@
 # Matrix Element Generations (sherpa & Herwig)
 #workflows[533]=['',['sherpa_ZtoEE_0j_BlackHat_13TeV_MASTER','HARVESTGEN']]
 workflows[534]=['',['sherpa_ZtoLL_2j_MEPSatNLO_13TeV_MASTER','HARVESTGEN']]
-workflows[535]=['',['TTbar_13TeV_Pow_herwig7','HARVESTGEN']]
 workflows[536]=['',['sherpa_ttbar_2j_MENLOPS_13TeV_MASTER','HARVESTGEN']]
 
+
 # Hadronization (LHE Generation + Hadronization)
 workflows[555]=['DYTollJets_NLO_Mad_13TeV_py8',['DYToll012Jets_5f_NLO_FXFX_Madgraph_LHE_13TeV','Hadronizer_TuneCP5_13TeV_aMCatNLO_FXFX_5f_max2j_max0p_LHE_pythia8','HARVESTGEN2']]
 workflows[513]=['WTolNuJets_LO_Mad_13TeV_py8',['WTolNu012Jets_5f_LO_MLM_Madgraph_LHE_13TeV','Hadronizer_TuneCP5_13TeV_MLM_5f_max4j_LHE_pythia8','HARVESTGEN2']]     # ALWAYS RUN
@@ -43,6 +43,10 @@
 workflows[519]=['WTolNuJets_LO_Mad_13TeV_py8_taurhonu',['WTolNu01234Jets_5f_LO_MLM_Madgraph_LHE_13TeV','Hadronizer_TuneCP5_13TeV_MLM_5f_max4j_LHE_pythia8_taurhonu','HARVESTGEN2']]
 workflows[520]=['VHToHtt_NLO_Pow_13TeV_py8_taurhonu',['VHToH_Pow_LHE_13TeV','Hadronizer_TuneCP5_13TeV_Httrhonu_powhegEmissionVeto_pythia8','HARVESTGEN2']]
 
+
+workflows[535]=['',['TTbar_13TeV_Pow_herwig7','HARVESTGEN']]
+workflows[537]=['',['DYToLL012Jets_5FS_TuneCH3_13TeV_amcatnloFxFx_herwig7','HARVESTGEN']]
+workflows[538]=['',['DYToLL01234Jets_5FS_TuneCH3_13TeV_madgraphMLM_herwig7','HARVESTGEN']]
 # External Decays
 
 workflows[521]=['WTolNuJets_LO_Mad_13TeV_py8_Ta',['WTolNu01234Jets_5f_LO_MLM_Madgraph_LHE_13TeV','Hadronizer_TuneCP5_13TeV_MLM_5f_max4j_LHE_pythia8_Tauola','HARVESTGEN2']]
diff --git a/Configuration/PyReleaseValidation/python/relval_steps.py b/Configuration/PyReleaseValidation/python/relval_steps.py
index 29daf6d228c46..17a98f05d6cf3 100644
--- a/Configuration/PyReleaseValidation/python/relval_steps.py
+++ b/Configuration/PyReleaseValidation/python/relval_steps.py
@@ -1543,6 +1543,8 @@ def gen2018RD(fragment,howMuch):
 
 #Herwig7
 steps['TTbar_13TeV_Pow_herwig7']=genvalid('Configuration/Generator/python/TT_13TeV_Pow_Herwig7_cff',step1LHEGenDQM)
+steps['DYToLL012Jets_5FS_TuneCH3_13TeV_amcatnloFxFx_herwig7']=genvalid('Configuration/Generator/python/DYToLL012Jets_5FS_TuneCH3_13TeV_amcatnloFxFx_herwig7_cff',step1LHEGenDQM)
+steps['DYToLL01234Jets_5FS_TuneCH3_13TeV_madgraphMLM_herwig7']=genvalid('Configuration/Generator/python/DYToLL01234Jets_5FS_TuneCH3_13TeV_madgraphMLM_herwig7_cff',step1LHEGenDQM)
 
 
 # Heavy Ion