---
title: "Run until Peak | Technical Reference"
slug: "run-until-peak"
description: "Learn about the run until peak which allows the user to enter a negative simulation duration to continue the simulation until all 2D domain have peaked. "
tags: ["2D modelling"]
updated: 2022-07-29T10:27:06Z
published: 2022-07-29T10:27:06Z
canonical: "help.floodmodeller.com/run-until-peak"
stale: true
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.floodmodeller.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Run until Peak

2D solver allows the user to enter a negative simulation duration to continue the simulation until all 2D domains have peaked.

When the following conditions are met, 2D solver will finalise result files and exit:

All inflow boundaries have finished

All cells in the model have a depth below their recorded peak depth

The simulation time is a multiple of one hour

This option is not supported when using linked models or when using varying head vs time boundaries.

The following example code snippet shows an example of a negative simulation duration:

... <time>

<start_time>00:00:00</start_time>

<start_date>1/1/2000</start_date>

<total unit="hour">-1.0</total>

</time> ...