Global adh5_scale_scan (wave data): incomplete
Global elog_validate_attributes (string logbook, string attributes): function currently not implemented, always returns 0
Global epics_connect (): the X03DA channel names are hard-coded.
Global load_hemi_scan (string nickname, string pathname, string filename): function not implemented
Global mtrx_open_file (string pathName, string fileNameOrPath): fix possible cache issues, add an option to override the cache.