Validations in portal rows

[Robert Collins]

Forgivce me if this has been covered before.

I have a situation where a table called invoices

has a portal to sales line items.

One of the fields in this portal row is governed by a validation calculation.

The problem I have is when data is entered into this field (valid or not) unless I click away from the portal row, it does not come up with my custom validation failed message.

Is there away round this as I would like it to show as soon as the tab or return key is pressed while in that field.

thanks