For such a simple file do NOT use proc import. Just read it.
data want ;
infile 'myfilename' dsd truncover firstobs=3;
input especialidad edad sexo
reserva_mes_d reserva_dia_d reserva_hora_d
creacion_mes_d creacion_dia_d creacion_hora_d
latencia canal tipo show
;
run;
If it turns out that by starting on line 3 you are missing the first row of actual data then your header line was not actually wrapped onto two lines in your file. It just looked that way because it was longer than the screen you where using to view it.
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