One last question : as the system has missed some sending to the accounting software during a few days, can I use an auto action to manually send the data.
Suggest just inserting the information manually directly in the accounting software.
Which auto action could I use for instance to only input the payment number and have the onCPayAfterPaymentStatusUpdateEvent triggered manually to send not already transferred data ?
Manually firing triggers like that will not work. Triggers are fired within the moment in the context of a specific situation. Firing them manually just results in all the data being missing and resulting in nothing happening.