Hi

I had the same problem with a wizard in Odoo 12. I think it is because lauching a wizard is not sufficient to set the value of some fields (even if you can pass the values of fields through the context and compute some other fields). I solved it by a button in the wizard. In your case, don't use a _default_get function, but compute the binary field upon clicking an "object" button (could be just a "Confirm" button). To avoid the button closing the wizard, you need a return to a ir.actions.act_window that reloads the wizard at the end of the function.

Pierre-François

Hi,

Please do this.

<a href="#" onclick="window.open('/web_custom/static/src/index.html', '_blank')" >To Access Index Html Page</a>

Regards,

Silvestar