Hi Amalia,
Thanks for your details information.
Firstly, when you enter the invoice for asset 3005, the Cap. date is "00.00.0000" because this is a new created asset and it doesn't have any transactions before.
If your asset have any transactions but the cap. date is not updated, please tell me.
The Cap. date will be picked up automatically base on the acquisition date, and it can be change manually by AS02.
Secondly, the error message "Fill in All Required Entry Fields" comes because you don't field in Scap value.
Please fill the value of scrap value in here.
If you don't need to use this field, you can change the field's status by going to Tcode AO21, choose your screen layout and change the field Scrap value to Required to Optional.
Regards,
Julie