fopen error using text file

I have the code below but when I run, I get a textscan error. I am not sure what else I can try....I know that my text file is in my current MATLAB folder so the path should be okay...

ExPath = [pwd,'/watershed.txt'];
fid=fopen(ExPath)
data = textscan(fid,'%d %d %d %f %f %f %f %f', 'headerlines',1);


Error using textscan
Invalid file identifier. Use fopen to generate a valid file identifier.

Answer 1

[Star Strider]

Use the fullfile function to build the complete path.