I am struggling with a supposedly easy task in Odoo 12 CE.

In my custom module I can print a report from the drop-down menu without problem.

The code in my report that seems to work fine:

<report
    id="report_service_registration"
    string="Workorder Info"
    model="yacht.service.registration"
    report_type="qweb-html"
    name="yacht_repair_management.yacht_service_report"
    file="yacht_repair_management.yacht_service_report"
    print_report_name="'Job Info- %s' % (object.customer)"/>

Now I have created an action button in my form view. 

I need that button to do exactly the same as the "dropdown print".

Here the code for the button in my form:

<button class="oe_stat_button"
    name="%(my_report)d"
    string="WO Info"
    type="action"
    icon="fa-print"
    help="Print Workorder Sheet">
</button>

I tried all kinds of names e.g. (yacht_service_registration.my_report) yes,
even with the id (report_service_registration).

The button appears just fine in the form but there is no action whatsoever when clicking.