It sounds as though you need to complete the add investment function - I’d imagine that the second invoice, when connected to an active asset would need the investment function completing.

To do that, go to the the manual supplier invoice / posting proposal and select add investment and complete the investment process.

We have done that and it does not work. I thing the issue is it is fully depreciated and the depreciation plan ended 31/07/2023. the invoice date was 01/08/2023 but we have just received it.

The object is still an active object and as we are adding investment to it from 08/2023 i would expect it to roll up depreciation. Investment 08/2023 -07/2024 to give new value.