Unable to import txt file

I tried earlier on with the exact same code and it works. However, it came out with this error when I tried again.

[KSSV]

Is that the error? Or more lines shown? Is the said folder present in the path?

[Ng Yong Jie]

that is the only line of error

Answer 1

[Walter Roberson]

train = fullfile(dataFolder, "train_FD001.txt");
[train_data1, train_labels1] = importdata(train)