title: Magento Customer Attributes Import/Export
body: <p>I've added a custom attribute to the customer account i Magento. It's a multiselect attribute.
  When I export customers to cvs via dataprofiles the attribute is present in the CSV with ids separated by commas i.e "13,14".
  When I try to import customers with the multiselect attribute Magento gives me following error:</p>
  
  <blockquote>
    <p>File is totally invalid. Please fix errors and re-upload file
    Checked rows: 1, checked entities: 1, invalid rows: 1, total errors: 1</p>
  </blockquote>
  
  <p>The error relates to the column with my custom attribute.</p>
  
  <p>How do i remedy this error?</p>