# 2.7 Running and stopping a simulation

A simulation is started when clicking on the Start button in the simulation control part of the Scenario tab ([![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/wAPOxwfmkzRvFdWU-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/wAPOxwfmkzRvFdWU-image.png)). The simulation starts and all other commands/buttons are, meanwhile, disabled except the stop button ([![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/CppWpIRYKfIwat3F-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/CppWpIRYKfIwat3F-image.png)). SEAMCAT automatically performs the consistency check of the scenario parameters before starting the event generation (see Section ‎2.9).

The simulation runs until the number of events has been performed or if the simulation is stopped prematurely by pressing the stop button.

<div class="rich-media-item mediaSingleView-content-wrap image-align-start css-ow6fp0" data-layout="align-start" data-media-vc-wrapper="true" data-node-type="mediaSingle" data-renderer-start-pos="504" data-vc="media-single" data-width="493" data-width-type="pixel" id="bkmrk-"><div class="css-fif458"><div class="css-vhfmu2" contenteditable="false" data-media-badges="true" data-testid="media-badges">  
</div><div data-alt="" data-collection="contentId-493633" data-context-id="493633" data-file-mime-type="" data-file-name="file" data-file-size="1" data-height="49" data-id="a2aa5d8c-0bba-41b2-9bde-8da26ae40427" data-node-type="media" data-renderer-start-pos="505" data-type="file" data-width="494"><div class="_2rko18qm _vchhusvi _kqswh2mm _ect4ttxp _p12f1osq _c71l1osq _1bsb1qmm _4t3ine4n _1hlmd0i9 _1rquusvi _eg541i5c _mts3kb7n _1ntskb7n _yfmhtlke _5sb1v00u new-file-experience-wrapper" data-media-vc-wrapper="true" data-testid="media-card-view"><div class="_1reo15vq _18m915vq _2rko18qm _1e0c1txw _kqswh2mm _p12f1osq _1bsb1osq _4t3i1osq _c71l1osq media-file-card-view" data-cursor="pointer" data-test-media-name="32.png" data-test-progress="1" data-test-source="remote" data-test-status="complete" data-testid="media-file-card-view"><div class="_kqswstnw _1bsb1osq _4t3i1osq _1e0c1txw _2lx21bp4 _1bah1h6o _4cvr1h6o" data-testid="ImageRendererWrapper">![](blob:https://ecowiki.atlassian.net/40f5c0cd-b5a5-4f15-8a5c-e4beb0990ad1#media-blob-url=true&id=a2aa5d8c-0bba-41b2-9bde-8da26ae40427&collection=contentId-493633&contextId=493633&width=494&height=49&alt=&clientId=113268fe-fe5b-4bc3-8ff3-07965dbf1d18)</div></div></div></div></div></div>[![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/6m4apRJA466YHp1V-image.png)](https://wiki.cept.org/uploads/images/gallery/2026-04/6m4apRJA466YHp1V-image.png)

<div class="fabric-editor-block-mark fabric-editor-alignment align-center" data-align="center" id="bkmrk-figure-32%3A-simulatio">**Figure 32: Simulation control window in the scenario tab** </div>