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

tags/3008 libexpat.dll is missing

Douglas Pearman, modified 7 Years ago.

tags/3008 libexpat.dll is missing

Youngling Posts: 1 Join Date: 10/9/13 Recent Posts
I have downloaded the source code from the tags/3008 directory using TortoiseSVN.

Using Visual Studio 2010 and compiling with Intel(R) Visual Fortran Compiler XE [IA-32]...

I had to use the newest Fortran compiler because the older version did not have win32 on install.

Can someone please assist me with this problem? (I may have missed the solution in previous threads...)

Thank you,

Adri Mourits, modified 7 Years ago.

RE: tags/3008 libexpat.dll is missing

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

You're the first one using the Intel 14 compiler.

I assume the problem is the same as when switching from Intel 12 to Intel 13. That means you have to replace all occurrences of "IFORT_COMPILER12"/"IFORT_COMPILER13" by "IFORT_COMPILER14" in the VisualStudio project files. Have a look at this thread.

Please report your findings on this forum.