333
334
raise osv.except_osv(msg_title, "The 'maintenance start date' is missing on the line with '%s'" % line.product_id.name)
334
335
if not line.maintenance_end_date:
335
336
raise osv.except_osv(msg_title, "The 'maintenance end date' is missing on the line with '%s'" % line.product_id.name)