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this is the node, not the element!

I checked the node and maybe the problem comes from the fact that the density close to the the piles of temporary bridge is very low, and that mesh nodes present Y coordinate rounded roughly. Do you have any idea how I can get more precision on the mesh coordinates using BK?

Many thanks again for your reactivity.

I usually translate the mesh in X and Y to avoid long coordinates numbers. You can perform this BK : Select your T3 Mesh -> Edit -> Shift in X/Y.

You can also specify you X/Y origin when creating your SELAFIN in latest version of BK. (Warning : This info is lost if you use FUDAA later in your workflow.)

You can also use double precision to increase the number of decimals.

Thanks a lot for your reply.
I am now sure it is the origin of the problem as my coordinates are with 6 digits without decimals, which rounds the decimals to one digit.
Just an additional question, I would rathe prefer to keep the original CRS. Can I create a double precision mesh with BK in SELAFIN format to get used with Telemac2D?

Yes, this is all explained in the manual!

You can easily create a double precision SELAFIN (SELAFIND) using BK.

Dear all,

I finally managed to solve the problem. It was due to rounding of the coordinates (single precision selafin file) combined with system coordinates with too many digits. A single shift of the data solved the issue.

Thanks for your support.