Automatic caracteristics derivation

Hello expert,

I encounter the folllowing issue.

We create automatic internal order. The settlement rule is automatically set to PSG on the internal orders.

I have created caracteristics derivation rule so that PSG is filled automatically.

After internal order creation if I enter only in display mode then the derivation is not done but if i enter in change mode and look the PSG the caracteristics are automatically filled...

I would like to derivate the caracteristics without needing to enter in change mode in my internal order : is it possible and how to do it?

Regards,

Céline