Hello 

Hope follwing link will helps you . have a look.

http://maheshwarimayur.blogspot.in/2014/06/how-to-merge-delivery-order-in-openerp.html

I try to install merge.picking modul. It cannot be use, because drop some exception when check the field.

I hack some parts from the code, and it's will be run, avoiding the problems when the code try to understand what is the diff. between the models. this is merge_picking.py

    def is_compatible_many2one(self, cr, uid, target, merge, context=None):
    fields_pool = self.pool.get("ir.model.fields")
    fields_search = fields_pool.search(cr, uid, [('ttype','=','many2one'),('model','=','stock.picking'),('relation','<>',self._name)])
    failedfields = []
    for field in fields_pool.browse(cr, uid, fields_search, context):

        # don't handle specialhandlers fields as incompatible            
        if field.name in self.get_specialhandlers().keys():
            continue

        # compare fields
        related_target_id = getattr(target, field.name)
        related_merge_id = getattr(merge, field.name)
        if (related_target_id.id != related_merge_id.id):
            failedfields.append(field)
    failedfields = [] # modify here always be empty  
    return {'result': (len(failedfields)==0), 'fields': failedfields}

I hack the failed fields and it will be ok. But this code drop the other place also the error, and I cut off also.

    def do_target(self, cr, uid, ids, context=None):
    # look if we got compatible views
    picking_pool = self.pool.get('stock.picking')

    found = False
    found_incompatible = False
    incompatible_notes = _('Near misses:')

    for session in self.browse(cr, uid, ids):
        # search if there are any compatible merges at all
        similiar_ids = picking_pool.search(cr, uid, [('id','<>',session.target_picking_id.id),
                                            ('state','=',session.target_picking_id.state),
                                            ('type','=',session.target_picking_id.type),
                                            ('invoice_state','=',session.target_picking_id.invoice_state),
                                           ])

        # ensure that many2one relations are compatible 
        for merge in picking_pool.browse(cr, uid, similiar_ids):
            is_compatible = self.is_compatible_many2one(cr, uid, session.target_picking_id, merge, context)
            found = True
            if (is_compatible['result']):
                found = True
            else:
                found_incompatible = True
                for f in is_compatible['fields']:
                    desc = self.get_fieldname_translation(cr, uid, f, context)
                    incompatible_notes += "\n" + _('%s: %s (%s) differs.') % (str(merge.name), desc, f.name) 
    found = True # modify here always be true
    found_incompatible = False # modify here always be true
    if not found: 
        if (found_incompatible):
            raise osv.except_osv(_('Note'),_('There are no compatible pickings to be merged.') + "\n" + incompatible_notes)
        else:
            raise osv.except_osv(_('Note'),_('There are no compatible pickings to be merged.'))

        return self.return_view(cr, uid, 'merge_picking_form_init', ids[0])
    # else:
    return self.return_view(cr, uid, 'merge_picking_form_target', ids[0])

Now it can be use under 6,1. I tested it, the code run it without problems. I think this is safe because some other item can be guarantee what you can merge. Example wizzard domain filtering in merge_picking_view.xml

Now i need to make some modification in sales modul, because when I merge the delivery orders and invoice it, the sales order view progressbar cannot find the items. (never be go on 100%)

Kedves klacus, amennyiben jártas vagy az OPENERP rendszerben kérlek vedd fel velem a kapcsolatot: lehnerviktor@gmail.com