# \#wave-model
**URL:** https://forum.ecmwf.int/tag/wave-model/135.md
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## [WAM crashes when writing output, fort.30](https://forum.ecmwf.int/t/wam-crashes-when-writing-output-fort-30/12185)
**Author:** [@Joakim\_Kjellsson](https://forum.ecmwf.int/u/Joakim_Kjellsson)\
**Replies:** 8\
**Last updated:** [23 April 2019 11:58 UTC](https://forum.ecmwf.int/t/wam-crashes-when-writing-output-fort-30/12185 "2019-04-23T11:58:36Z")
Hi I tried for the very first time to activate WAM output in OpenIFS cy40, but got a model crash that I don't understand. The crash happens on the last time step (step 119 of 120) and the message is THE WAVE MODEL …
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## [Wave model bug if wam output and restarts are both enabled](https://forum.ecmwf.int/t/wave-model-bug-if-wam-output-and-restarts-are-both-enabled/12108)
**Author:** [@Glenn\_Carver](https://forum.ecmwf.int/u/Glenn_Carver)\
**Replies:** 0\
**Last updated:** [11 April 2019 15:59 UTC](https://forum.ecmwf.int/t/wave-model-bug-if-wam-output-and-restarts-are-both-enabled/12108 "2019-04-11T15:59:11Z")
A bug has been found in the wave model code for version 38r1 and 40r1 of OpenIFS. The bug causes the wave model to crash under specific circumstances. Only if (i) wave model output is enabled; (ii) model restarts are ena…
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## [How to turn on output from WAM?](https://forum.ecmwf.int/t/how-to-turn-on-output-from-wam/12160)
**Author:** [@Meri\_Korhonen](https://forum.ecmwf.int/u/Meri_Korhonen)\
**Replies:** 8\
**Last updated:** [20 March 2019 07:56 UTC](https://forum.ecmwf.int/t/how-to-turn-on-output-from-wam/12160 "2019-03-20T07:56:10Z")
Is there any existing documentation on the WAM namelists? I need to know how to turn it on to write output? I couldn't find any information on the parameters in the namelist (there are two namelists, wam\_namelist and w…