First confirm that the file waufMR10033_CC110033-0005.nii exists in the specified path /work/cnelab/Camcan/CONN_proj/preprocessed_rest/. Check file permissions to ensure you have read access.

If the path or file name is incorrect, update it in your script. For MATLAB, it would be something like filePath = /correct/path/to/your/file/waufMR10033_CC110033-0005.nii;. Also, confirm the NIfTI file is not corrupted by opening it with a NIfTI viewer.