'Unable to open file' error with importdata

I am trying to import data from a .txt file with the same structure as below

with the code below, I am looking for a .txt file and I try to save each column in a matlab file but matlab tells me 'Unable to open file'

[filename,pathname]=uigetfile({'*.fl.txt' 'Torque file (*.fl.txt)'},'Select a torque curve');
            
            if filename ~= 0
            
                Spill = importdata(filename);
                extracted=Spill.data
                CDC_N=extracted(:,1)
                CDC_Torque=extracted(:,2)
                save('CDC.mat','CDC_N','CDC_Torque');
            
            end

if anyone could help me, I'd be grateful.

thanks

Answer 1

[per isakson]

Replacing

Spill = importdata(filename);

with

Spill = importdata( fullfile( pathname, filename );

may help.

[Max-Henri Froger]

thanks, it was the problem