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'Unable to open file' error with importdata

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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

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Accepted Answer

per isakson
per isakson on 12 Aug 2020
Edited: per isakson on 12 Aug 2020
Replacing
Spill = importdata(filename);
with
Spill = importdata( fullfile( pathname, filename );
may help.

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