Cannot get help with -h or --help?

[acampove]

Hi,

When I do:

geoDisplay -h

i see:

[acampove@thinkbook Detector]$ geoDisplay -h
PersistencyIO    INFO  +++ Set Streamer to dd4hep::OpaqueDataBlock
DD4hep           INFO  ++ Using globally Geant4 unit system (mm,ns,MeV)
Info in <TGeoManager>: Changing system of units to Geant4 units (mm, ns, MeV).
Info in <TGeoManager::TGeoManager>: Geometry default, Detector Geometry created
Info in <TGeoNavigator::BuildCache>: --- Maximum geometry depth set to 100
geoPluginRun: No geometry input supplied. No geometry will be loaded.
   ------------------------------------------------------------------
  | Welcome to ROOT 6.30/08                        https://root.cern |
  | (c) 1995-2024, The ROOT Team; conception: R. Brun, F. Rademakers |
  | Built for linuxx8664gcc on Jun 24 2024, 13:00:44                 |
  | From heads/master@tags/v6-30-08                                  |
  | With g++ (GCC) 13.1.0                                            |
  | Try '.help'/'.?', '.demo', '.license', '.credits', '.quit'/'.q'  |
   ------------------------------------------------------------------

Info in <TGeoManager::SetVisLevel>: Automatic visible depth disabled
RunPlugin        ERROR ++ Exception while executing plugin DD4hep_GeometryDisplay:
                dd4hep: apply-plugin: Failed to execute plugin DD4hep_GeometryDisplay
dd4hep: with plugin:DD4hep_GeometryDisplay
Application      ERROR geoPluginRun: Uncaught exception: RunPlugin: ++ Exception while executing plugin DD4hep_GeometryDisplay:
                dd4hep: apply-plugin: Failed to execute plugin DD4hep_GeometryDisplay
dd4hep: with plugin:DD4hep_GeometryDisplay

and when I do

geoDisplay --help

i see:

[acampove@thinkbook Detector]$ geoDisplay --help
PersistencyIO    INFO  +++ Set Streamer to dd4hep::OpaqueDataBlock
DD4hep           INFO  ++ Using globally Geant4 unit system (mm,ns,MeV)
Info in <TGeoManager>: Changing system of units to Geant4 units (mm, ns, MeV).
Info in <TGeoManager::TGeoManager>: Geometry default, Detector Geometry created
Info in <TGeoNavigator::BuildCache>: --- Maximum geometry depth set to 100
geoPluginRun: No geometry input supplied. No geometry will be loaded.
   ------------------------------------------------------------------
  | Welcome to ROOT 6.30/08                        https://root.cern |
  | (c) 1995-2024, The ROOT Team; conception: R. Brun, F. Rademakers |
  | Built for linuxx8664gcc on Jun 24 2024, 13:00:44                 |
  | From heads/master@tags/v6-30-08                                  |
  | With g++ (GCC) 13.1.0                                            |
  | Try '.help'/'.?', '.demo', '.license', '.credits', '.quit'/'.q'  |
   ------------------------------------------------------------------

Info in <TGeoManager::SetVisLevel>: Automatic visible depth disabled
RunPlugin        ERROR ++ Exception while executing plugin DD4hep_GeometryDisplay:
                dd4hep: apply-plugin: Failed to execute plugin DD4hep_GeometryDisplay
dd4hep: with plugin:DD4hep_GeometryDisplay
Application      ERROR geoPluginRun: Uncaught exception: RunPlugin: ++ Exception while executing plugin DD4hep_GeometryDisplay:
                dd4hep: apply-plugin: Failed to execute plugin DD4hep_GeometryDisplay
dd4hep: with plugin:DD4hep_GeometryDisplay

shouldn't that show me the help menu, e.g. the arguments that the command takes? Am I missing anything? As far as I understand, this is the universal convention for any command line utility.