怎么办啊,求助

DICOM整理时一直都不行
报错如下

Warning: Directory "F:\matlab7.0\work" already exists.
> In mkdir at 116
  In rest_DicomSorter_gui>btnRun_Callback at 175
  In gui_mainfcn at 75
  In rest_DicomSorter_gui at 26
??? Error using ==> images\private\dicom_set_mmeta_encoding
Could not determine file encoding.

Error in ==> rest_DicomSorter at 30
    dicominfotmp = dicominfo([rawdir,filesep,rawdata(i).name]);