ERROR: Could not open file : DISK_ERR

It is a little bit strange. When I upload the code and write save() in the console. Everything is working well. But when I call reset(); and load(); then I get DISK_ERR, but not directly.

I do the following:

function onInit() {
  var spi = new SPI();
  spi.setup({mosi:B14,miso:B15,sck:B13});
  E.connectSDCard(spi, A8);
  eval(require('fs').readFile('code.js'));
}

In the code.js there are subsequent file access routines.