Error using xlsread (line 251) Error: Unspecified error

My xlsread works generally. All of a sudden today, it shouted this error with the same code I have been using since ages. I am running on 2017b version. I have tried all suggestions such as changing excel sheet format, changing the adds-in option in the excel file menu. I trial tested running code on other computer with 2017b and it works. Something went pear shaped with my computer MATLAB. I am quite desperate to rectify this since its one of my basic codes which is followed by main analysis. Seems like a bug which can be corrected. I would extremely if anyone could suggest anything?

[OCDER]

Does xlsread work by itself?

[filename, filepath] = uigetfile('*.xlsx');
[a, b, c] = xlsread(fullfile(filepath, filename)) %Error?

If no error, then something is odd with the code. What is your code?