We support only the use of Telemac on the latest version! So please upgrade your version
About the file, yes, it's a minimum to declare the culvert file in the keyword CULVERT DATA FILE.
Regards
Christophe
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Great news: The next TELEMAC User Conference will be organised by Bangor University on the 15th and 16th of October 2025, at the School of Ocean Sciences in Menai Bridge, on the Isle of Anglesey, Wale [ ... ]