The file itself may be the problem. There could be a text line in it that is stopping textscan.
Try this to see:
C = textscan(fread, formatSpec);
A = [C{:}];
fseek(fread,0,0);
C = textscan(fread, formatSpec, 'HeaderLines',1);
A = [A{:}; C{:}];
You can also use the fgets or fgetl to see what the next lines are, and then change the subsequent textscan calls to make it work with your file.
NOTE: You are inadvertently ‘shadowing’ (or ‘overshadowing’) the fread function. This could be a problem if you need it in your code later. Rename your file ID ‘fidin’ or some such instead to avoid the problem.
