# How to use proteus with PayInvoice Wizard
**URL:** https://discuss.tryton.org/t/how-to-use-proteus-with-payinvoice-wizard/3939
**Category:** User
**Created:** [March 13, 2021, 3:06pm UTC](https://discuss.tryton.org/t/how-to-use-proteus-with-payinvoice-wizard/3939 "2021-03-13T15:06:49Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@rvong](https://discuss.tryton.org/u/rvong)
#### Post date: [March 13, 2021, 3:06pm UTC](https://discuss.tryton.org/t/how-to-use-proteus-with-payinvoice-wizard/3939/1 "2021-03-13T15:06:49Z")
I have a problem getting proteus to execute the `account.invoice.pay` wizard. It raises the following error:
```auto
Traceback (most recent call last):
File "./pay_invoices.py", line 221, in
run()
File "./pay_invoices.py", line 217, in run
main(args.database, args.config_file, args.source)
File "./pay_invoices.py", line 202, in main
pay_supply_invoices(source, config.get_config())
File "./pay_invoices.py", line 188, in pay_supply_invoices
pay_invoice = Wizard("account.invoice.pay", context=config.context)
File "/home/richi/work/pyenv/tryton54/lib/python3.6/site-packages/proteus/ __init__.py", line 1207, in __init__
self.execute(self.start_state)
File "/home/richi/work/pyenv/tryton54/lib/python3.6/site-packages/proteus/ __init__.py", line 1234, in execute
ctx)
File "/home/richi/work/pyenv/tryton54/lib/python3.6/site-packages/proteus/config.py", line 188, in __call__
result = rpc.result(meth(*args, **kwargs))
File "/home/richi/work/pyenv/tryton54/lib/python3.6/site-packages/trytond/wizard/wizard.py", line 295, in execute
return wizard._execute(state_name)
File "/home/richi/work/pyenv/tryton54/lib/python3.6/site-packages/trytond/wizard/wizard.py", line 307, in _execute
list(view['fields'].keys()))
File "/home/richi/work/pyenv/tryton54/lib/python3.6/site-packages/trytond/wizard/wizard.py", line 93, in get_defaults
defaults.update(default(fields))
File "/home/richi/work/pyenv/tryton54/lib/python3.6/site-packages/trytond/modules/account_invoice/invoice.py", line 2738, in default_start
default['company'] = invoice.company.id
File "/home/richi/work/pyenv/tryton54/lib/python3.6/site-packages/trytond/model/modelstorage.py", line 1401, in __getattr__
return super(ModelStorage, self). __getattr__ (name)
File "/home/richi/work/pyenv/tryton54/lib/python3.6/site-packages/trytond/model/model.py", line 281, in __getattr__
% (self. __name__ , name, self._values))
AttributeError: 'account.invoice' Model has no attribute 'company': None
```
I know the wizard accesses the current invoice ID from the context `active_id`, so I set this value in the proteus config context before calling the wizard, but it still doesn’t work. Here is my code:
```auto
with config.set_context(active_id=invoice.id):
pay_invoice = Wizard("account.invoice.pay", context=config.context)
pay_invoice.form.date = invoice.invoice_date
pay_invoice.form.description = mov_id
pay_invoice.execute('choice', context=config.context)
if (pay_invoice.form. __class__. __name__ == 'account.invoice.pay.ask'):
pay_invoice.form.type = 'writeoff'
pay_invoice.form.writeoff = writeoff_precio
pay_invoice.execute('pay', context=config.context)
print(f"Paid, move {mov_id}")
```
I trace the error and it is due to `Transaction().context['active_id']` not returning a value when `PayInvoice.default_start(self, fields)` is called, as if setting the active\_id context in proteus config has no effect in the Transaction context.
Can someone tell me what I am doing wrong?
---
### Author:  [@rvong](https://discuss.tryton.org/u/rvong)
#### Post date: [March 13, 2021, 5:32pm UTC](https://discuss.tryton.org/t/how-to-use-proteus-with-payinvoice-wizard/3939/2 "2021-03-13T17:32:17Z")
I figured out the problem. I was not passing the correct parameters to proteus `Wizard` constructor.
I need to pass the invoice to the `model` argument in the constructor, and within the constructor this set to `active_id` in the context.
So the working code is:
```auto
pay_invoice = Wizard("account.invoice.pay", context=config.context, models=[invoice])
```
---
### Author:  [@system](https://discuss.tryton.org/u/system)
#### Post date: [April 12, 2021, 5:32pm UTC](https://discuss.tryton.org/t/how-to-use-proteus-with-payinvoice-wizard/3939/3 "2021-04-12T17:32:21Z")
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