The screenshot is not sufficient to answer your question.
The message "no modification of bottom" is a normal print of telemac if you don't change the subroutine corfon or user_corfon.
There is a crash in your case but we're not able to say where...
Christophe
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The XXXth TELEMAC User Conference will take place from 8 to 10 October 2024 at the Savoie Stadium, in Chambéry, France (location on Google Maps, about 15 minutes walk from Chambéry – C [ ... ]