I replaced the website_templates.xml with an orginal.

When I updated the system I received this error.

The server is up and running but in the message center the pfd documents are not viewable

2015-03-24 18:39:49,931 5662 WARNING BDBC openerp.addons.document.std_index: Failed attempt to execute pdftotext. This p rogram is necessary to index the file /tmp/tmpEcoXXd.pdf of MIME type application/pdf. Detailed error available at DEBUG level.

2015-03-24 18:39:49,974 5662 WARNING BDBC openerp.addons.document.std_index: Failed attempt to execute pdftotext. This p rogram is necessary to index the file /tmp/tmpzJdQj9.pdf of MIME type application/pdf. Detailed error available at DEBUG level.

2015-03-24 18:39:50,062 5662 WARNING BDBC openerp.addons.document.std_index: Failed attempt to execute pdftotext. This p rogram is necessary to index the file /tmp/tmpz337m5.pdf of MIME type application/pdf. Detailed error available at DEBUG level.

2015-03-24 18:39:50,110 5662 WARNING BDBC openerp.addons.document.std_index: Failed attempt to execute pdftotext. This p rogram is necessary to index the file /tmp/tmp2dGZVu.pdf of MIME type application/pdf. Detailed error available at DEBUG level.