intro story D-Flow FM


D-Flow Flexible Mesh

D-Flow Flexible Mesh (D-Flow FM) is the new software engine for hydrodynamical simulations on unstructured grids in 1D-2D-3D. Together with the familiar curvilinear meshes from Delft3D 4, the unstructured grid can consist of triangles, pentagons (etc.) and 1D channel networks, all in one single mesh. It combines proven technology from the hydrodynamic engines of Delft3D 4 and SOBEK 2 and adds flexible administration, resulting in:

  • Easier 1D-2D-3D model coupling, intuitive setup of boundary conditions and meteorological forcings (amongst others).
  • More flexible 2D gridding in delta regions, river junctions, harbours, intertidal flats and more.
  • High performance by smart use of multicore architectures, and grid computing clusters.
An overview of the current developments can be found here.
The D-Flow FM - team would be delighted if you would participate in discussions on the generation of meshes, the specification of boundary conditions, the running of computations, and all kinds of other relevant topics. Feel free to share your smart questions and/or brilliant solutions! 


We have launched a new website (still under construction so expect continuous improvements) and a new forum dedicated to Delft3D Flexible Mesh.

Please follow this link to the new forum: 

Post your questions, issues, suggestions, difficulties related to our Delft3D Flexible Mesh Suite on the new forum.





Sub groups
D-Flow Flexible Mesh
Cohesive sediments & muddy systems


Message Boards

Error in startup script

Lawrence Barrett, modified 4 Years ago.

Error in startup script

Youngling Posts: 4 Join Date: 12/22/15 Recent Posts
Got this error when i try to run D3D.

Couldn’t read file “C:/Deltares/Delft3D_4.01.01.rc.03/win32/menu/bin/create_config_xml.tcl”: no such file or directory while executing
“source [file join $env(D3D_HOME) $env(ARCH) menu bin create_config_xml.tcl]”
(file “C:\Deltares\Delft3D_4.01.01.rc.03\/win32/menu/bin/hyd_online.tcl” line 20)

Does anyone have a solution?

i create a blank file with the name "create_config_xml.tcl” but i then get this message....Executable "d_hydro.exe" not found on directory.

need some assistance. can you send me these files and i just paste the them into the directory? will that work?

Adri Mourits, modified 4 Years ago.

RE: Error in startup script (Answer)

Yoda Posts: 1221 Join Date: 1/3/11 Recent Posts
Hi Lawrence,

This tcl script is inside the source code.
If you download the source code, compile it and install it following the instructions on this page, the tcl script will be installed in the right location.

If you want to repair it manually:
Copy file:
Into your Delft3D installation, default directory:
c:\Program Files (x86)\Deltares\Delft3D 4.01.00\win32\menu\bin