title: Prestashop _PS_MODE_DEV_ and WebService
body: <p>I am in a particular situation.
  I use the prestashop webservice with a cron to update my prestashop database and synchronize with my management software.
  The problem is that i have to set  _PS_MODE_DEV_ to OFF for many reasons, and in particular for some errors that prestashop fix setting _PS_MODE_DEV_ to OFF.</p>
  
  <p>For example a checkout error:
  <a href="http://www.prestashop.com/forums/topic/344514-solved-unable-to-save-account-parsererror-one-page-checkout/page-2" rel="nofollow">http://www.prestashop.com/forums/topic/344514-solved-unable-to-save-account-parsererror-one-page-checkout/page-2</a></p>
  
  <p>BUT if a set _PS_MODE_DEV_ to OFF, my WebService stop working.
  How can i solve it ?</p>
  
  <p>Thanks.</p>