I am unable to select my bank accounts to enter payment orders.
The accounts approved for user identification are transmitted by the bank with the HTD order type. If you have entered new accounts with the bank, your access authorizations in BL Banking need to be updated. To do so, mark the respective bank or several/all banks in the Orders view and press F5; alternatively right-click and select update. The currently valid access authorizations are then retrieved by the desired banks. If you still do not have access to some of your accounts, the bank has most likely not approved these for EBICS access. Please contact the bank about this.