Reserves

Setting money aside for later, releasing it and moving it between reserves.

A reserve sets money aside inside the bank account that holds it and carries forward for ever. (The books, the server and MCP call them funds.)

Set aside into a new reserve and it is created in the same revision.
Release money back to free money, or move it between reserves of the same bank account. Money never moves across banks.
Only what is there can be set aside: the source’s lowest balance from that day on must cover the amount.
If you ask for too much the preview names the shortfall under Amount and nothing can be saved.

Moving money between different bank accounts is a real transfer. Record it only after it happened at the bank.

The effect on availability

Setting aside $100 reduces Cash on Hand by $100 without changing the bank’s inclusive balance. Releasing it restores that free money. Moving between reserves in the same home changes neither Cash on Hand nor the bank balance. Spending $100 directly from a funded reserve does not reduce Cash on Hand again.

Check the date and physical home

The source must cover the allocation at the end of its date and every later day, including future spending already recorded. Different bank accounts require a real transfer, even when both named reserves are synthetic. Kabacus cannot execute it: record the actual transfer only after it has happened.