I Tried to Install account_payment_extension it is open source module developed for 6.x version. But now i try to install on OpenERP 7, but it making error, i got this error wizard_payment_order('populate_payment_ext') TypeError: __new__() takes exactly 1 argument (2 given), previously i faced the error that is ImportError: No module named wizard then i change hide the import wizard and class wizard_payment_order(osv.TransientModel): here is my code #import wizard import pooler from tools.misc import UpdateableStr import time from osv import fields, osv

FORM = UpdateableStr()

FIELDS = { 'entries': {'string':'Entries', 'type':'many2many', 'relation':'account.move.line',}, 'communication2': {'string':'Communication 2', 'type':'char', 'size': 64, 'help':'The successor message of payment communication.'}, }

field_duedate={ 'duedate': {'string':'Due Date', 'type':'date','required':True, 'default': lambda *a: time.strftime('%Y-%m-%d'),}, 'amount': {'string':'Amount', 'type':'float', 'help': 'Next step will automatically select payments up to this amount as long as account moves have bank account if that is required by the selected payment mode.'}, 'show_refunds': {'string':'Show Refunds','type':'boolean', 'help':'Indicates if search should include refunds.', 'default': lambda *a: False}, } arch_duedate=''' <form string="Search Payment lines" col="2"> <field name="duedate"/> <field name="amount"/> <field name="show_refunds"/> </form>'''

def search_entries(self, cr, uid, data, context): search_due_date = data['form']['duedate'] show_refunds = data['form']['show_refunds']

pool = pooler.get_pool(cr.dbname)
order_obj = pool.get('payment.order')
line_obj = pool.get('account.move.line')

payment = order_obj.browse(cr, uid, data['id'],
        context=context)
ctx = ''
if payment.mode:
    ctx = '''context="{'journal_id': %d}"''' % payment.mode.journal.id

# Search for move line to pay:
domain = [('reconcile_id', '=', False),('account_id.type', '=', payment.type),('amount_to_pay', '<>', 0)]

if payment.type =='payable' and not show_refunds:
    domain += [ ('credit','>',0) ]
elif not show_refunds:
    domain += [ ('debit','>',0) ]

if payment.mode:
    domain += [('payment_type','=',payment.mode.type.id)]

domain += ['|',('date_maturity','<',search_due_date),('date_maturity','=',False)]
line_ids = line_obj.search(cr, uid, domain, order='date_maturity', context=context)


FORM.string = '''<?xml version="1.0" encoding="utf-8"?>

<form string="Populate Payment:"> <field name="entries" colspan="4" height="300" width="800" nolabel="1" domain="[('id', 'in', [%s])]" %s=""/> <separator string="Extra message of payment communication" colspan="4"/> <field name="communication2" colspan="4"/> </form>''' % (','.join([str(x) for x in line_ids]), ctx)

selected_ids = []

amount = data['form']['amount']
if amount:
    if payment.mode and payment.mode.require_bank_account:
        line2bank = line_obj.line2bank(cr, uid, line_ids, payment.mode.id, context)
    else:
        line2bank = None
    # If user specified an amount, search what moves match the criteria taking into account
    # if payment mode allows bank account to be null.
    for line in line_obj.browse(cr, uid, line_ids, context):
        if abs(line.amount_to_pay) <= amount:
            amount -= abs(line.amount_to_pay)
            selected_ids.append( line.id )
else:
    selected_ids = line_ids

return {
    'entries': selected_ids,
}

def create_payment(self, cr, uid, data, context): line_ids= data['form']['entries'][0][2] if not line_ids: return {}

pool= pooler.get_pool(cr.dbname)
order_obj = pool.get('payment.order')
line_obj = pool.get('account.move.line')

payment = order_obj.browse(cr, uid, data['id'],
        context=context)
t = payment.mode and payment.mode.type.id or None
line2bank = pool.get('account.move.line').line2bank(cr, uid,
        line_ids, t, context)

## Finally populate the current payment with new lines:
for line in line_obj.browse(cr, uid, line_ids, context=context):
    if payment.date_prefered == "now":
        #no payment date => immediate payment
        date_to_pay = False
    elif payment.date_prefered == 'due':
        date_to_pay = line.date_maturity
    elif payment.date_prefered == 'fixed':
        date_to_pay = payment.date_scheduled

    if payment.type == 'payable':
        amount_to_pay = line.amount_to_pay
    else:
        amount_to_pay = -line.amount_to_pay
    pool.get('payment.line').create(cr,uid,{
        'move_line_id': line.id,
        'amount_currency': amount_to_pay,
        'bank_id': line2bank.get(line.id),
        'order_id': payment.id,
        'partner_id': line.partner_id and line.partner_id.id or False,
        'communication': (line.ref and line.name!='/' and line.ref+'. '+line.name) or line.ref or line.name or '/',
        'communication2': data['form']['communication2'],
        'date': date_to_pay,
        'currency': line.invoice and line.invoice.currency_id.id or False,
        'account_id': line.account_id.id,
        }, context=context)
return {}

class wizard_payment_order(osv.TransientModel): """ Create a payment object with lines corresponding to the account move line to pay according to the date provided by the user and the mode-type payment of the order. Hypothesis: - Small number of non-reconcilied move line , payment mode and bank account type, - Big number of partner and bank account.

If a type is given, unsuitable account move lines are ignored.
"""
states = {

    'init': {
        'actions': [],
        'result': {
            'type': 'form',
            'arch': arch_duedate,
            'fields':field_duedate,
            'state': [
                ('end','_Cancel'),
                ('search','_Search', '', True)
            ]
        },
     },

    'search': {
        'actions': [search_entries],
        'result': {
            'type': 'form',
            'arch': FORM,
            'fields': FIELDS,
            'state': [
                ('end','_Cancel'),
                ('create','_Add to payment order', '', True)
            ]
        },
     },
    'create': {
        'actions': [],
        'result': {
            'type': 'action',
            'action': create_payment,
            'state': 'end'}
        },
    }

wizard_payment_order('populate_payment_ext') Please help me i struggled here.

Thanks& Regards Sridharan G