Add Pythia8_Powheg_Main31_tW.py in list of allowed PH control files
Changes introduced
Added "Pythia8_Powheg_Main31_tW.py" as allowed control file to fix failure in !2346 (merged)
Tests
Issues resolved
Closes #
Added "Pythia8_Powheg_Main31_tW.py" as allowed control file to fix failure in !2346 (merged)
Closes #