Dear transiesta users,

i am using SIESTA 4.1-b1 to do transport calculations.

for scattering calculations, i define the electrodes like this :

=====================================
#define electrodes
%block TS.Elecs
  Left
  Right
%endblock TS.Elecs
=====================================
#define "Left" electrode
%block TS.Elec.Left
  HS GR_Electrode_Left.TSHS
  chem-pot Left #chemical potential corresponding to this electrode
  semi-inf-dir -a3 #transport direction in this electrode
  elec-pos begin 1 #number of first atom of "Left" electrode
%endblock TS.Elec.Left
=====================================
#define "Right" electrode
%block TS.Elec.Right
  HS GR_Electrode_Right.TSHS
  chem-pot Right
  semi-inf-dir +a3
  elec-pos end -1 #last atom of "Right" electrode corresponds to last atom in 
geometry
%endblock TS.Elec.Right
=====================================

the calculations stops with this error :
Left electrode file does not exist. Please create electrode 'NOT REQUESTED' 
first.

i verify the existence of the electrode.TSHS file (GR_Electrode_Left.TSHS)
and that the positions in the scattering are the same as in the left electrode

any suggestions please
kind regards
taoufik


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