problem with pythia-pgs installation

Hi,

while trying to install pythia in MG5 2.4.2 with install pythia-pgs I get

Command "install pythia-pgs " interrupted in sub-command:
"install pythia-pgs" with error:
IndexError : list index out of range

in MG5_debug there is something like

install pythia-pgs
Traceback (most recent call last):
  File "/home/krolb/MG5_aMC_v2_4_2/madgraph/interface/extended_cmd.py", line 1009, in onecmd
    return self.onecmd_orig(line, **opt)
  File "/home/krolb/MG5_aMC_v2_4_2/madgraph/interface/extended_cmd.py", line 964, in onecmd_orig
    return func(arg, **opt)
  File "/home/krolb/MG5_aMC_v2_4_2/madgraph/interface/master_interface.py", line 458, in do_install
    self.cmd.do_install(self, *args, **opts)
  File "/home/krolb/MG5_aMC_v2_4_2/madgraph/interface/madgraph_interface.py", line 5533, in do_install
    path[split[0]] = split[1]
IndexError: list index out of range

Thanks,
Krzysztof