errno = WTAP_ERR_CANT_READ;
bytes_read = file_read(frame_table, frame_table_length, wth->fh);
if ((guint32)bytes_read != frame_table_length) {
errno = WTAP_ERR_CANT_READ;
bytes_read = file_read(frame_table, frame_table_length, wth->fh);
if ((guint32)bytes_read != frame_table_length) {