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

Windows 7 run error

Sander Vos, modified 8 Years ago.

Windows 7 run error

Youngling Posts: 1 Join Date: 3/19/12 Recent Posts

I use windows 7 with Visual Studio 2010 and Intel Fortran 11.1. I can compile version Delft3D_v4.00.07.0892 and Delft3d_v5.00.06.1677.
But when I run the executables the programs crashes with the error:

Time to finish 0s, 98.7% completed, time steps left 4
Time to finish 0s, 99.0% completed, time steps left 3
Time to finish 0s, 99.3% completed, time steps left 2
Time to finish 0s, 99.7% completed, time steps left 1

ERROR: child killed: segmentation violation
- Starting "d_hydro.exe" may give more information:
- Run "deltares_hydro.exe <INI-inputfile> -keepXML".
- Run "d_hydro.exe TMP_config_flow2d3d_<processId>.xml".
Druk op een toets om door te gaan. . .

The debugger indicated that the heap is damaged. Example one (examples provided with the source code) crashes at line 288 in esm.cpp. Example two crashes at line 228 in flow_nxtstp.cpp
When you continue the program in the debugger the program finishes normally.

Does anyone have a suggestion how to solve this problem?

Kind Regards,

Sander Vos
Adri Mourits, modified 8 Years ago.

RE: Windows 7 run error

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

The lines where it crashes seem allright. The esm.cpp code hasn't changed the last 10 years.
We do have a problem with "Windows 7" + "VS2010" + "Intel Fortran 12.1 update 9" when running example one. We are checking whether this will be solved with update 11.
(Windows-)Releases are built with "Vista" + "VS2008" + "Intel Fortran 11.0". I use "Windows 7" + "VS2010" + "Intel Fortran 12.0". Both work fine.