open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello, I'm having trouble creating a network with four subnets (three-channel network) in Blue Kenue. When creating a network in a 16 km² catchment area with an edge length of 1.00m, I get the network attached. Can someone help me what this error could be and how I can fix it so that the mesh is created without errors? Thank you

Hi
No network attached.
But are you sure you want to mesh an area of 16 km² with a maximum edge length of 1m and with local edge length of 34cm?
With an edge length of 1m, we could roughly estimate the triangle area at 0.5m². This leads to 32M elements

Regards