Questionable results when using the adhoc solver

I've had reports from the MEng students that supply values do not match consumption values when using the adhoc solver (UK Transport model). Switching to the scipy solver fixes the problem.

I have no idea what the problem is, just making a note of this as a warning to anyone that's still using the adhoc solver.

Ideally I'd quite like to drop the adhoc solver, although we can't do this yet as the scipy solver is unsuitable for some models due to memory issues. I think my efforts are probably better spent improving the scipy solver so that the adhoc solver becomes redundant, rather than fixing bugs in the adhoc solver (unless this turns out to be really easy to fix)

まず、adhoc と scipy の両方の solver を使用して UK Transport モデルを再現し、供給値と消費値を比較します。そのケースで使用されている solver のエントリポイントとモデル設定を特定します。原因を特定して不一致を修正するか、adhoc solver を変更すべきでない場合は再現可能な制限事項を文書化できれば完了です。

索引モデルが issue の本文から書いたものです。